Presidential Foreign Policy Powers Have Few Limits. Here’s Why.

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On February 4, 2026, President Donald Trump spoke with Chinese President Xi Jinping for 90 minutes—discussing Taiwan’s future, Iranian nuclear threats, and trade—without asking Congress for permission.

Congress learned about these significant commitments largely after the fact, with little ability to influence or reverse them.

The Constitution appears to divide control over foreign affairs between the legislative and executive branches. Yet decades of judicial decisions, historical practice, and political inertia have tilted that struggle decisively toward the presidency.

From declaring wars without Congressional authorization to negotiating binding agreements without Senate ratification to abruptly reversing long-standing policies toward rival nations, presidents across the political spectrum have accumulated foreign policy authority that would have seemed extraordinary to the Constitution’s Framers.

This concentration exists not because the Constitution explicitly grants it, but because of how that document has been interpreted, how its ambiguities have been resolved in practice, and how the political branches have chosen to exercise their powers.

The Constitutional Blueprint and Its Ambiguity

The Constitution does not clearly assign foreign policy authority to either branch. Instead, it splits foreign policy powers between branches in confusing ways.

Congress has powers to regulate commerce with foreign nations, declare war, raise and support armies, and make rules for the government and regulation of the land and naval forces. The President’s most important foreign affairs powers—making treaties and appointing ambassadors—depend on Senate approval.

The President’s constitutional sources of foreign policy authority use notably vague language compared to the enumerated powers granted to Congress. The chief executive holds the title of Commander in Chief, receives ambassadors and other public ministers, and possesses “the executive power.” The document does not explicitly enumerate what comprises “the executive power,” nor does it define presidential foreign affairs authority with precision.

The document’s silence on foreign policy questions has proven consequential. It says nothing about the power to terminate treaties, though presidents have claimed and exercised this power unilaterally. It contains no discussion of executive agreements—the binding commitments that presidents make without Senate approval. It does not explain how the power to “receive ambassadors” translates into the power to recognize foreign governments and establish diplomatic relations entirely through executive action.

These gaps have been filled by more than two centuries of presidential assertion, occasional Congressional acquiescence, and Supreme Court language that has sometimes encouraged and sometimes merely failed to arrest the growth of presidential power.

Constitutionally, foreign policy authority is supposed to be shared, contested, and balanced. In practice, presidential power predominates in nearly all foreign affairs decisions made in real time.

Congress retains theoretical leverage through the treaty power, the war powers, and the power of the purse. But using these levers requires overcoming structural obstacles, political barriers, and constitutional interpretations that have made Congressional action difficult, uncertain, and often ineffective.

The Trump-Xi call exemplifies this reality: a consequential commitment involving commercial policy (which theoretically the legislature controls), military concerns (which theoretically lawmakers guard), and diplomatic relations (which theoretically they influence through treaty and appropriations power) was made entirely by one person without meaningful Congressional involvement.

The Curtiss-Wright Doctrine: Supreme Court Creates Presidential Supremacy

The most important explanation for why presidential foreign policy powers have so few limits comes from a 1936 Supreme Court case.

Justice George Sutherland’s majority opinion went far beyond what the case required, creating sweeping language about presidential power that would echo through American constitutional law for decades.

Sutherland began with a historical claim: that the federal government’s foreign affairs powers did not derive from enumerated grants but rather from powers that come with being a nation—powers that any sovereign nation must possess. Because these powers were inherent to sovereignty rather than constitutionally delegated, Sutherland reasoned, they could not be divided between branches in the same way domestic powers were.

Sutherland explicitly contrasted expansive foreign affairs authority with the limited authority available in domestic affairs.

Modern constitutional scholarship has identified significant problems with Sutherland’s historical analysis. The Framers did not believe that foreign affairs powers were inherent sovereign powers beyond constitutional division; rather, they deliberately divided those powers between the branches and expected ongoing negotiation over their boundaries. Sutherland’s claim about uniquely superior information has been undermined by modern congressional capabilities, intelligence community infrastructure, and the reality that lawmakers receive extensive briefings on foreign policy.

Yet despite these scholarly critiques, the case remains cited by executive branch lawyers whenever a president needs legal justification for expansive foreign policy powers.

Courts have never fully repudiated the doctrine, though they have grown more reluctant to rely on its broadest language. The Court has applied a more restrained approach while still acknowledging significant presidential authority over recognition of foreign governments. Yet even in recent cases, the Court has distinguished between exclusive presidential powers and the broader range of foreign affairs matters where the legislature retains significant authority.

The doctrine provided constitutional legitimacy for a particular vision of presidential power that other branches and much of the public have embraced. When courts speak of “the sole organ” of American foreign policy or acknowledge presidential expertise and capacity for secrecy, they create a doctrinal permission structure for presidential unilateralism.

The Trump-Xi call sits comfortably within this framework: one person speaking for the nation, conducting negotiations, and making commitments that others cannot reverse. The legislature’s theoretical role in foreign affairs is frequently overshadowed by the practical reality that the executive acts first, often secretly, and lawmakers respond after the fact—if they respond at all.

The War Powers Resolution: Congressional Attempt to Reassert Authority

The War Powers Resolution emerged from Vietnam War trauma, after presidents had committed American forces to years of combat without explicit Congressional authorization. Members recognized that the Constitutional provision giving the legislature the power to declare war had become nearly meaningless: presidents had fought major wars without declarations, sustained them for years without approval, and claimed inherent constitutional authority to do so.

The War Powers Resolution required notification within 48 hours of committing armed forces to military action and prohibited the armed forces from remaining engaged for more than 60 days without Congressional authorization or a declaration of war, with an additional 30-day withdrawal period permitted.

Richard Nixon vetoed the War Powers Resolution, arguing it was an “unconstitutional restriction” on presidential power. The legislature overrode his veto by overwhelming bipartisan majorities in both chambers, establishing the law that remains in effect today.

The decades since passage have revealed the War Powers Resolution to be largely ineffective. Presidents from both parties have treated the law as an inconvenience rather than a binding constitutional constraint.

They have ignored the 60-day deadline multiple times. Presidents have continued military action for months past the statutory deadline, and lawmakers could not muster the political will to force withdrawal. Similarly, successive administrations have conducted military operations against ISIS, in Syria, in Iraq, and elsewhere without explicit Congressional authorization, claiming that existing authorizations for military force from 2001 and earlier provided sufficient legal basis.

Lawmakers have passed resolutions expressing concern about presidential military actions, and occasionally significant majorities have voted to require withdrawal from conflicts the White House wanted to continue. Yet absent a veto-proof majority supporting withdrawal—which requires two-thirds of both chambers—the executive can simply veto the Congressional resolution and continue military action.

This creates a structural bias toward presidential action: only one-third-plus-one of either chamber is needed to sustain a veto, while the legislature needs overwhelming consensus to force a change in policy. Presidents understand these mathematics and therefore discount Congressional opposition.

When military action becomes controversial, lawmakers may resist, but the sunk costs of ongoing operations, the risk of appearing weak or unpatriotic, and the tendency for emergency situations to amplify executive power often keep them from acting decisively.

Executive Agreements: Presidents Bypass the Treaty Process

One of the most significant shifts in foreign policy authority involves the replacement of treaties with executive agreements.

The treaty process appears to be democracy’s great check on presidential power: the chief executive can negotiate treaties, but the Senate must approve them by a two-thirds majority. This super-majority requirement was designed to ensure that major commitments had broad support.

Yet over the past century, this process has become increasingly obsolete. Most commitments are now made as “executive agreements” that never go to the Senate.

Since the late 1930s, more than 90 percent of all agreements concluded on behalf of the United States have been executive agreements rather than treaties. The shift has accelerated in recent decades: the Trump administration submitted only five treaties for Senate approval during his entire first term, while the Obama administration submitted about five per year, and earlier administrations submitted even more.

If the trend continues, the treaty process could become nearly extinct, leaving the Senate’s advice and consent power as a formality applied to only a handful of agreements annually. Yet executive agreements are binding under law the same way treaties are, meaning the chief executive can commit the United States without the super-majority vote the Constitution ostensibly requires.

The legal authority for executive agreements rests on shaky constitutional ground. The document itself mentions neither executive agreements nor any presidential power to make commitments without Senate approval. Yet courts and executive branch lawyers have justified executive agreements through various doctrines: as agreements made pursuant to existing treaties (which the Senate already approved), as agreements made pursuant to congressional authorization, or as agreements made under inherent constitutional authority over foreign relations.

The Case-Zablocki Act of 1972 requires reporting executive agreements to Congress within 60 days, but this transparency requirement provides little practical constraint since lawmakers rarely take action in response.

The Iran nuclear agreement exemplifies how completely the executive agreement mechanism bypasses treaty approval. The Joint Comprehensive Plan of Action (JCPOA) was a binding agreement involving extraordinary consequences for American foreign policy—lifting sanctions on Iran and committing the United States to complex verification procedures and limitations on its future actions.

Yet rather than submitting it to the Senate as a treaty, the Obama administration structured it as an executive agreement, preventing a two-thirds super-majority vote that would likely have rejected it. The legislature passed a law allowing it to review the agreement and express disapproval, but this review mechanism still required a two-thirds Congressional majority to stop it—a higher bar than the treaty requirement.

When Trump took office, he withdrew from the agreement unilaterally, treating his own reversal of a major commitment as a purely executive prerogative.

The shift from treaties to executive agreements represents a quiet constitutional revolution. The Framers designed the treaty requirement to constrain presidential power and ensure that major commitments had broad political support. Yet presidents discovered that by making agreements executive agreements instead of treaties, they could avoid Senate approval entirely.

Courts have generally permitted this practice, sometimes explicitly acknowledging that executive agreements may not have the “dignity” of a treaty but are legally equivalent. One person now possesses enormous authority to commit the United States without the super-majority approval supposedly required.

Recognition Power: Unilateral Authority Over Foreign Relations

Perhaps the most important recent Supreme Court clarification of presidential foreign policy authority established that one person alone can decide which governments are legitimate, and courts won’t second-guess it.

The case arose when the legislature passed a law allowing Americans born in Jerusalem to have “Israel” listed as their place of birth on their passports. The State Department refused, arguing that allowing this listing would contradict recognition policy toward Jerusalem. The Supreme Court sided with the executive, holding that lawmakers cannot compel contradicting recognition determinations in official documents.

Justice Kennedy’s majority opinion reasoned that the constitutional role “to receive Ambassadors and other public Ministers” implicitly grants the power to recognize foreign governments. When a country receives an ambassador from a government, it effectively recognizes that government’s legitimacy—a recognition that only one person can grant or withhold. Additional powers to make treaties and appoint ambassadors reinforce this exclusive recognition authority.

The Court emphasized functional considerations: “The Nation must have a single policy regarding which governments are legitimate in the eyes of the United States and to accord them favorable or, conversely, hostile treatment.”

Recognition power translates into extraordinary practical authority over foreign policy. Decisions about whether to recognize a foreign government, whether to establish or break diplomatic relations, and whether to acknowledge changes in a country’s effective control of territory all rest with one person.

In 1979, Jimmy Carter unilaterally recognized the People’s Republic of China and broke diplomatic relations with Taiwan, terminating a mutual defense treaty without seeking Congressional consent. The action was tremendously consequential: it shifted American diplomatic recognition from one government to another, fundamentally altering the diplomatic situation in Asia. Lawmakers had not authorized this, had not been meaningfully consulted, and could not easily reverse it.

Carter’s actions were controversial, and the legislature responded by passing the Taiwan Relations Act to try to constrain future presidential flexibility toward Taiwan. Yet basic authority to make the decision remained unchanged.

More recently, the Trump administration has used recognition power to influence foreign policy. When the administration recognized Israeli sovereignty over the Golan Heights, a territory that most countries consider occupied rather than legitimately annexed, it was exercising unilateral recognition authority that lawmakers could not easily override.

Intelligence, Secrecy, and Information Asymmetry

An often-overlooked reason why presidential foreign policy powers operate with so few limits involves control over intelligence and classified information.

The chief executive receives the President’s Daily Brief, a highly classified summary of the most sensitive intelligence about foreign threats and developments. The legislature receives intelligence briefings and has the right to be kept “fully and currently informed” of intelligence activities, but the administration controls what lawmakers learn, when they learn it, and in what detail.

The Trump-Xi call on February 4, 2026, almost certainly involved discussions informed by classified intelligence that the legislature did not see in real time, and most lawmakers would never learn what was discussed.

The practical consequence is that the White House operates with information advantages that the legislature cannot overcome. Claims can be made about classified intelligence justifying foreign policy decisions that lawmakers cannot verify without accessing the same classified information.

When a president claims that an action is necessary for national security, the legislature faces an impossible choice: accept the assessment without full information, demand access to classified material and thereby limit how it can respond, or reject the judgment without fully understanding the threat that supposedly justified the action.

This information asymmetry has grown more pronounced as the intelligence community has expanded and as foreign policy has become increasingly intertwined with classified intelligence and covert operations. Presidents across the political spectrum have used national security classifications to withhold information, and the legislature has generally been unable to compel disclosure of highly classified materials short of the most dramatic confrontations.

Congressional Checks: Why the Legislature Cannot Constrain the Executive

The legislature possesses multiple constitutional and statutory powers that, in theory, give it the ability to constrain presidential foreign policy.

It controls the purse and can refuse to appropriate funds for military actions or foreign aid. It can declare war and thereby attempt to force the executive to seek authorization. It can ratify or reject treaties, supposedly ensuring that major commitments have broad political support. It can pass legislation restricting how foreign policy is implemented, and it can exercise its investigative and oversight powers to hold the administration accountable.

Yet these theoretical powers have proven remarkably ineffective in practice.

The legislature rarely uses its most powerful tool—the power of the purse—to cut off funding for military actions or foreign policy initiatives the White House wants to continue. A resolution denying funds is vulnerable to a presidential veto, and forcing acceptance of budget restrictions usually requires a two-thirds Congressional majority to overcome that veto.

This super-majority requirement means that only one-third-plus-one support is needed to continue a preferred policy, while opponents of that policy need overwhelming consensus. Given the reality that the legislature is usually divided and that criticizing foreign policy is politically risky, presidents routinely get the benefit of Congressional inaction.

Congressional treaty rejection is theoretically a powerful check, but it is rarely used. The Senate has only rejected a handful of treaties in American history, despite having the power to do so. This rarity reflects multiple factors: the difficulty of achieving a two-thirds majority on any controversial matter, the fact that rejected treaties damage credibility, and the political costs of appearing to undermine the administration on foreign policy.

Presidents understand that the super-majority requirement makes treaty rejection difficult, and they structure agreements as executive agreements to avoid the Senate altogether.

The War Powers Resolution’s failure to constrain presidential military action reflects broader dynamics. The legislature lacks an effective mechanism to force presidential compliance with its foreign policy preferences short of cutting off funding for an ongoing military operation—a drastic step that members are reluctant to take, especially when troops are in the field.

Legislative restrictions on presidential foreign policy authority face an additional obstacle: the idea that the legislature can’t limit powers given only to the executive. Where authority is not shared with the legislature—such as the recognition power—lawmakers cannot simply legislate restrictions on the exercise of that power.

Such Congressional statutes can be treated as unconstitutional and ignored. The Trump administration took this position in response to legislative restrictions on presidential removal of executive officials, arguing that the legislature could not constitutionally limit removal power. The Supreme Court’s recent decisions have tended to support expansive views of exclusive presidential power, making it increasingly difficult for lawmakers to legislate constraints on presidential authority in areas courts view as within the executive domain.

Perhaps the most important reason the legislature cannot effectively constrain presidential foreign policy involves political party loyalty. When the chief executive and the Congressional majority belong to the same party, lawmakers are unlikely to confront the administration on foreign policy for fear of appearing disloyal or undercutting the party’s credibility.

When the legislature is controlled by the opposition party, the White House can threaten to veto any restrictions lawmakers try to impose, requiring a two-thirds majority to override—a threshold the legislature usually cannot reach if the administration’s own party provides one-third-plus-one support.

Tariffs and Trade: Congressional Delegation of Constitutional Powers

A specific illustration of Congressional delegation of constitutional authority involves tariff policy.

The Constitution explicitly gives the legislature the power to “lay and collect Taxes, Duties, Imposts and Excises,” and lawmakers have primary responsibility for regulating foreign commerce. Yet beginning in the 1930s, they granted expanding authority to negotiate agreements and impose tariffs within parameters they established.

This “fast track” authority allowed negotiation of deals that the legislature would then approve or reject without amendment—a process that has evolved into near-total presidential control over policy within broad statutory delegations.

More recently, presidents from both parties have used statutes to impose tariffs without Congressional authorization. Section 232 of the Trade Expansion Act of 1962 authorizes tariff imposition if the Secretary of Commerce determines that imports threaten national security. Section 301 of the Trade Act of 1974 allows tariff imposition in response to unfair practices identified by the U.S. Trade Representative. The International Emergency Economic Powers Act of 1977 allows emergency declarations and broad economic restrictions, including tariffs.

Trump used Section 232 to impose tariffs on steel and aluminum, and threatened tariffs on China—all based on his assessment of national security implications rather than Congressional determination that these actions were necessary.

The tariff example reveals how the legislature can delegate its constitutional powers through legislation, and how courts will generally uphold such delegations even if they seem to transfer extraordinary authority. The Constitution gives lawmakers the power, they pass a law delegating that power within certain parameters, and the executive exercises the delegated power—often stretching the parameters considerably, as when Trump claimed that auto imports threaten national security.

Lawmakers can theoretically restrict or revoke these delegations, but doing so requires legislation that can overcome a presidential veto, creating the same super-majority obstacle that limits Congressional action generally.

The legislature’s own structural incentives often favor delegating power rather than exercising it directly. Policy creates powerful constituencies with conflicting interests. Lawmakers can avoid bitter internal conflict by delegating authority and letting the executive decide the difficult questions of which tariffs to impose, how to balance competing interests, and how to manage retaliation.

Quick action, speaking with a single voice, and avoiding the paralysis that might afflict a diverse legislature all become possible. The legislature benefits from this delegation because members can explain to angry constituencies that the White House made the decision, while they personally would have preferred a different outcome.

Taiwan and Congressional Constraints on Presidential Flexibility

The Trump-Xi call illustrates how presidents use their far-reaching foreign policy powers in concrete ways. The discussion of Taiwan is particularly revealing.

Xi emphasized that “the Taiwan question is the most important issue in China-U.S. relations” and stated that “Taiwan is China’s territory” and that the United States “must handle the issue of arms sales to Taiwan with prudence.” In the State Department readout, Beijing made clear that it expected the United States to honor previous commitments regarding Taiwan.

Trump made no explicit commitments regarding Taiwan, but his willingness to listen to Xi’s concerns without asserting Congressional statutory obligations toward Taiwan (which are encoded in the Taiwan Relations Act) reflects presidential diplomatic flexibility.

Under current law, lawmakers have directed provision of arms necessary for self-defense under the Taiwan Relations Act. This statutory obligation cannot be unilaterally changed.

However, interpretation of how aggressively to implement this obligation—how much military aid to provide, what types of weapons, how quickly, and whether to provide lethal assistance that the statute arguably contemplates—remains flexible. In principle, arms sales to Taiwan could be minimized as a concession to Beijing, and the legislature would face the difficult choice of cutting off overall foreign aid funding to force compliance with its Taiwan policy.

Members have complained that the Trump administration paused military aid to Taiwan in favor of arms sales (a technical distinction that reduces certain Congressional oversight) and that administration officials have been reluctant to engage directly with Taiwan to avoid upsetting Beijing. Yet leeway to interpret obligations to Taiwan and to balance those obligations against broader diplomatic priorities with China gives enormous flexibility.

After Carter unilaterally recognized the People’s Republic of China and broke diplomatic relations with Taiwan in 1979—a decision lawmakers considered an affront to their prerogatives—they passed the Taiwan Relations Act as a partial response. The Act declared that the United States would provide Taiwan with “arms of a defensive character,” would maintain the capacity to resist any use of force or coercion against Taiwan, and would treat any non-peaceful resolution of the Taiwan question as incompatible with American policy.

Forty-five years later, the Taiwan Relations Act remains a constraint on how completely presidential policy toward Taiwan can shift in response to Chinese pressure. Presidents cannot unilaterally overturn the statutory obligation to provide Taiwan with defensive arms. They can interpret that obligation narrowly, delay implementation, or balance it against other priorities, but they cannot simply announce that the United States will no longer support Taiwan’s defense without lawmakers moving to cut off other foreign aid or passing legislation reinforcing the commitment.

The Act has inspired follow-on legislation that lawmakers have passed to ensure that the United States maintains adequate military capacity to defend Taiwan, provides Taiwan with necessary weapons technology, and prevents the executive branch from unilaterally altering the status quo.

Yet even the Taiwan Relations Act illustrates the limits of Congressional constraint on presidential foreign policy. The ability to interpret statutory obligations to Taiwan, to balance them against diplomatic relationships with China, and to condition the provision of weapons on Taiwan’s defense policies gives the executive branch enormous flexibility.

Presidential Foreign Policy Power in Practice

The Trump-Xi call of February 4-5, 2026, exemplifies foreign policy authority exercised with minimal Congressional involvement, judicial review, or public deliberation. The discussion touched on commitments involving commercial policy (theoretically Congressional domain), military security (theoretically Congressional domain), and diplomatic relations (theoretically involving Congressional treaty ratification for major commitments).

Trump indicated that Xi should visit the White House later in the year. These commitments were made entirely through executive authority, based on the constitutional role as chief diplomat and executor of foreign affairs.

The conversation also implicated the Taiwan question, where lawmakers have passed legislation attempting to constrain presidential flexibility, yet enormous discretion remained in how to interpret and implement those statutory obligations. The discussion of potential soybean purchases implicated commercial policy, an area where broad authority has been delegated through various statutes. The mention of Iran touched on sanctions policy, another area where presidential authority is extensive.

For Americans concerned about how major foreign policy commitments are made, the Trump-Xi call illustrates several uncomfortable realities.

First, significant commitments to foreign governments can be made with no advance Congressional consultation and no requirement to obtain public approval. The American people learned about developments from news reporting, not from Congressional debate or executive branch notification.

Second, informational advantages and legal tools exist to conduct foreign policy that the legislature cannot easily monitor or reverse.

Third, theoretical powers to constrain presidential foreign policy have proven difficult to exercise in practice, requiring super-majority support and overcoming presidential vetoes.

And fourth, even when lawmakers pass legislation attempting to constrain presidential flexibility (as with the Taiwan Relations Act), enormous interpretive authority remains that can gradually shift policy in directions the legislature opposes.

The shift of foreign policy authority toward the presidency has occurred with broad support across parties and administrations. Republicans defended Trump’s authority to conduct the Xi call, the same way Democrats defended Obama’s authority to structure the Iran nuclear deal as an executive agreement rather than a treaty.

The shift reflects genuine functional advantages of presidential action, but it also reflects the absence of serious Congressional resistance and the political difficulty of maintaining opposition when the legislature is divided and crises loom.

The Debate: Should Presidential Foreign Policy Power Be This Broad?

The concentration of foreign policy authority in the presidency remains genuinely contested among constitutional scholars, foreign policy experts, and members of the legislature.

Those who defend expansive presidential power emphasize the need for speed, secrecy, and unity of purpose in responding to developments. Quick action is possible without waiting for Congressional deliberation, secret negotiations can be conducted that the legislature would likely leak, and speaking with one voice to foreign governments avoids the complications of multiple Congressional factions claiming equal legitimacy.

World crises do not wait for Congressional deliberation, and the intelligence required to respond effectively is often classified and cannot be broadly shared.

Defenders note that the Framers deliberately created a system of separation of powers precisely because they expected the branches to check each other through political struggle, not through formal legal constraints. Authority to negotiate and speak for the nation in foreign affairs has clear constitutional basis and has been endorsed by courts consistently since the earliest days of the Republic.

Lawmakers retain meaningful tools to constrain the executive: the power of the purse, treaty rejection, and legislative restrictions on how foreign policy can be implemented. If they choose not to exercise these powers, that reflects democratic choice, not constitutional deficiency.

Critics of expansive presidential authority offer a different assessment. They argue that the benefits of quick presidential action don’t justify the risks of concentrated power in foreign policy. Decisions involving commitment of military forces, sanction of foreign governments, or reversal of long-standing agreements should involve Congressional deliberation that ensures broad democratic support.

Control over classified information creates information asymmetries that the legislature cannot overcome, yet lawmakers are expected to exercise meaningful oversight without full information. The War Powers Resolution’s repeated failure to constrain presidential military action demonstrates that Congressional checks are ineffective in practice.

The shift from treaties requiring Senate approval to executive agreements requiring no Congressional approval represents a quiet constitutional revolution without democratic legitimation.

Critics note that the legislature can deliberate quickly when necessary, and sometimes Congressional deliberation produces better policy than unilateral presidential decision-making. The “unity” of speaking for the nation is not always an advantage when that unity masks dissent about policy direction and prevents the full airing of alternative approaches.

And if the Framers truly intended presidential dominance in foreign policy, they would not have bothered to give lawmakers any foreign affairs powers at all. The fact that the Constitution lists Congressional foreign policy powers suggests the Framers meant them to be used.

The debate over appropriate presidential foreign policy authority has real consequences. Unilateral presidential decisions to wage war have frequently turned out poorly, with quagmires in Vietnam, Iraq, and Afghanistan demonstrating the costs of decisions made without sustained Congressional and public support.

Conversely, Congressional deliberation can be slow and can produce inconsistent policy when lawmakers are divided and members vote to oppose an administration of the other party for partisan reasons.

Neither branch is demonstrably superior in foreign policy judgment; the question is whether decisions affecting national interests should require broader consensus before commitment.

Looking Ahead

More foreign policy power will probably continue to accumulate in the presidency unless lawmakers reassert their constitutional role more aggressively. This would require Congressional willingness to restrict defense appropriations to force withdrawal from military commitments, to use the treaty process more regularly for major agreements, to pass legislation constraining presidential authority over commercial policy, and to threaten meaningful consequences for presidential violations of foreign policy restrictions.

Presidents would fight back, and courts would probably side with them, along with political obstacles from within the legislature itself. Yet without such effort, the vision of shared foreign policy authority will continue to recede, leaving an increasingly unchecked presidency as the practical reality of American foreign policy-making.

The phone call happened. The commitments were made. And lawmakers learned about it afterward.

That’s how the system works now.

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