Does Congress Have Power to Block Treaty Withdrawals? The Legal Battle Ahead

Last updated 4 months ago. Our resources are updated regularly but please keep in mind that links, programs, policies, and contact information do change.

On February 4, 2026, President Trump signed a directive ordering the United States to exit sixty-six international organizations and treaties simultaneously—the largest mass withdrawal from global commitments in American history. The list sprawled across climate agreements, women’s health organizations, renewable energy partnerships, and regional development bodies. The presidential memorandum demanded “immediate steps to effectuate the withdrawal,” language that left little room for negotiation or delay.

But here’s the thing: nobody knows if a President can do this alone.

The Constitution explains in detail how America enters treaties—the executive branch negotiates, the Senate must approve by a two-thirds vote. What it doesn’t mention, anywhere, is how we leave them. That silence has created a constitutional gray zone that’s existed since 1789, occasionally producing legal skirmishes but never a definitive answer. Now, with sixty-six agreements on the chopping block at once, that academic debate has become an urgent practical problem that Congress, courts, and legal scholars can no longer avoid.

What the Constitution Says (and Doesn’t)

Article II gives the executive power to “make Treaties” with “the Advice and Consent of the Senate”—meaning two-thirds of senators present must agree. That’s it. The Framers wrote nothing about ending such agreements. Not a word about termination or what happens when a future administration wants out of commitments a previous one made.

This wasn’t an oversight exactly. The Framers probably assumed that the same process required to enter would govern exiting. Or maybe they figured future generations would work it out. Either way, they left us with a problem that’s been festering for 237 years.

The issue exploded in 1979 when the Carter administration terminated the Mutual Defense Treaty with Taiwan to normalize relations with China. Senator Barry Goldwater sued, arguing that Carter needed Senate approval—the same two-thirds vote required to ratify in the first place. The case reached the Supreme Court, which promptly punted. A plurality of justices invoked the “political question doctrine”—declaring that this was a fight between the executive and Congress that courts shouldn’t referee. Other justices said the case wasn’t ripe yet. Only Justice Brennan addressed the real question, arguing Carter lacked unilateral authority.

So the Supreme Court’s answer was: we’re not answering.

Since then, administrations have terminated dozens of agreements without serious congressional pushback. They cite this pattern as “established practice” proving they have the authority. Critics counter that repeated violations don’t create constitutional power—they mean Congress hasn’t fought back hard enough yet.

The Youngstown Test: Where Presidential Power Comes From

To understand whether Congress can block these actions, you need to understand how courts analyze presidential power. The framework comes from a 1952 case where the Truman administration tried to seize the nation’s steel mills during the Korean War without congressional approval. The Supreme Court said no, and Justice Robert Jackson’s concurring opinion laid out a test that courts still use today.

Jackson identified three categories. First: when the executive acts with congressional authorization, his power is “at its maximum.” He has both his own constitutional authority and whatever Congress has delegated to him. Most terminations don’t fit here—Congress rarely authorizes exits from specific agreements.

Second: the “zone of twilight” where Congress hasn’t granted or denied authority. Here, power depends on historical practice, functional necessity, and the nature of the power involved. This is where most of the current actions probably sit. Defenders of unilateral authority point to decades of terminations without congressional interference. They argue that custom has resolved the ambiguity in the executive’s favor.

Third: when the executive acts against Congress’s express or implied will, his power is “at its lowest ebb.” Courts scrutinize these actions carefully because the constitutional balance is at stake. Jackson wrote that exclusive control in such cases can only be sustained “by disabling the Congress from acting upon the subject”—a nearly impossible standard to meet.

Which category applies here? If Congress passes legislation blocking these actions or asserting authority over termination, the executive would be operating in category three—the most legally vulnerable position. But if Congress does nothing, the actions remain in category two, where historical practice might carry the day.

The NATO Precedent: When Congress Drew a Line

Congress has already restricted authority to exit one alliance, and the example is instructive. In 2019, concerned about Trump’s threats to leave NATO, Senators Tim Kaine and Marco Rubio introduced legislation limiting power to exit. The provision passed and is now codified at 22 U.S.C. § 1928f.

The statute is blunt. The executive “shall not suspend, terminate, denounce, or withdraw the United States from the North Atlantic Treaty…except by and with the advice and consent of the Senate, provided that two-thirds of the Senators present concur, or pursuant to an Act of Congress.” It also prohibits spending any appropriated funds to support exit without proper authorization.

This is the clearest congressional assertion of power over termination in modern American history. And it raises an obvious question: if Congress can restrict exit from NATO through ordinary legislation, why can’t it do the same for environmental agreements, women’s health organizations, or any of the other sixty-five targeted?

The Trump administration would argue the NATO statute is unconstitutional—an impermissible legislative intrusion on foreign relations authority. That argument has never been tested in court. But the statute’s existence proves Congress believes it has this power. The fact that it passed with bipartisan support suggests at least some Republicans agree that institutional prerogatives matter more than partisan policy preferences.

Why Courts Might Refuse to Decide

Even if Congress or environmental groups sue to block these actions, there’s a decent chance courts will decline to hear the case. The political question doctrine—the same escape hatch the Supreme Court used in the Goldwater case—remains available to judges who’d rather not wade into a separation-of-powers fight.

But the doctrine has narrowed since 1979. In 2015, the Supreme Court decided Zivotofsky v. Kerry, a case about whether the executive has exclusive authority to recognize foreign governments. The Court emphasized that the political question doctrine shouldn’t serve as a blanket exception to judicial review, particularly when the case involves straightforward constitutional interpretation that courts routinely handle. The justices were willing to police the boundaries of executive authority even in foreign affairs.

Applying that logic here, you could argue that “Does the executive have unilateral authority to withdraw from Senate-ratified agreements?” is exactly the kind of constitutional question courts are supposed to answer. It’s not asking judges to decide whether withdrawing from the Paris Agreement is good policy—that would be a political question. It’s asking who has the constitutional power to make that decision in the first place.

Still, courts have other tools to avoid deciding. The ripeness doctrine lets them dismiss cases filed before termination takes effect. Standing requirements could knock out plaintiffs who can’t demonstrate concrete injury. Individual members of Congress face particularly steep barriers—courts generally don’t let legislators sue the executive branch over policy disputes.

Environmental groups and states might have better luck. Coastal states facing impacts could sue to protect their territory, invoking the “special solicitude” doctrine from Massachusetts v. EPA, which gave states broader standing in environmental cases. But even they’d need to show that a court order could fix their problem, which gets complicated when the injury stems from a foreign policy decision affecting global negotiations.

What Congress Can Do

If Congress wants to fight back, it has options beyond hoping courts will intervene.

The most powerful immediate tool is the appropriations process. Congress could insert language into spending bills prohibiting the use of any funds to implement these sixty-six exits. The NATO statute already does this for that specific alliance. Congress could replicate that model across the board, specifying that no money may be spent on termination activities without congressional authorization.

When such provisions appear in must-pass appropriations bills—the kind needed to prevent government shutdowns—they create enormous pressure. The executive can veto the entire bill, but that triggers a political crisis. And if Congress has the votes to override the veto (two-thirds in both chambers), the restriction becomes law regardless of objections.

Congress could also pass standalone legislation requiring congressional approval for terminations, either generally or for specific categories of agreements. This would likely face a veto, requiring an override. But even failed legislation serves purposes: it establishes a legislative record of Congress’s constitutional position, frames the political battle in constitutional rather than policy terms, and constrains future administrations by demonstrating that Congress takes its institutional prerogatives seriously.

There’s also the leverage of future ratification. The Senate Foreign Relations Committee could announce that it won’t provide advice and consent to any future agreements unless the executive accepts specified limitations on unilateral termination authority. This operates prospectively, but it could substantially constrain action going forward.

Whether Congress has the political will to use these tools depends on whether enough members—particularly Republicans who might otherwise support the policy of withdrawing from these agreements—care more about institutional prerogatives than partisan outcomes.

Does Sixty-Six at Once Change Everything?

Here’s where the scale might matter legally, not politically alone.

The “major questions doctrine” has become increasingly prominent in constitutional law. It holds that courts won’t assume Congress has delegated extraordinary powers to the executive absent clear and specific statutory language. The Supreme Court has used this doctrine to strike down agency actions that would have massive economic or political significance without congressional authorization.

Some legal scholars argue that withdrawing from sixty-six agreements simultaneously—affecting everything from environmental policy to women’s health to regional security—might qualify as a “major question” requiring congressional approval. The scale itself becomes evidence that this isn’t routine executive discretion but an extraordinary assertion of power.

The pattern of isolated terminations over decades establishes no precedent for wholesale, simultaneous exit from such obligations. It’s the difference between occasionally exercising a power and claiming the authority to fundamentally reshape America’s global posture in a single afternoon.

Many of these agreements include specific procedures in their text. The Paris Agreement requires a year’s notice. The UN Framework Convention has its own procedural requirements. If the executive attempts to withdraw from multiple agreements simultaneously without following each one’s specific procedures, courts might view procedural shortcuts as evidence of exceeding constitutional authority. Questions also arise about whether these attempted actions are even valid under international law.

The Symmetry Argument: What Goes In Must Come Out the Same Way

One of the strongest arguments available to Congress rests on constitutional symmetry. The Constitution requires the executive to obtain Senate approval by a two-thirds vote to ratify. The logic is that these are fundamental obligations binding the nation that shouldn’t rest on whim alone.

If that logic applies to entering, why wouldn’t it apply to exiting?

Imagine an agreement that barely cleared the ratification threshold—67 senators supporting it out of 100 present. Should a single administration possess unilateral authority to undo the judgment of those 67 senators and nullify the entire legislative process? The symmetry argument says no. Exit should require either support from two-thirds of the current Senate or an act of Congress, mirroring the ratification process.

This has powerful intuitive appeal. It preserves the constitutional balance and prevents the executive from nullifying the Senate’s role through fiat. Constitutional scholars who support this view point out that the Framers deliberately made ratification difficult precisely because they wanted to ensure broad consensus before binding the nation to such obligations. Allowing unilateral termination defeats that purpose.

Critics raise functional concerns. Requiring Senate involvement in termination could paralyze American diplomacy. The Senate might prevent exit even when circumstances have fundamentally changed. And they note that historical practice has generally accepted such authority, suggesting the constitutional structure may not require symmetry even if it would seem elegant in theory.

But here’s the counterargument to the functional concern: if requiring Senate approval for termination would paralyze diplomacy, why doesn’t requiring Senate approval for ratification paralyze it? The answer is that the Framers thought some friction was worth it to ensure democratic accountability for major obligations. The same logic should apply to ending those obligations.

What Happened Last Time: The Kucinich Lawsuit

When the George W. Bush administration withdrew from the Anti-Ballistic Missile Treaty in 2001, 32 House members led by Representative Dennis Kucinich sued to challenge the action. Federal Judge John D. Bates dismissed the case, finding that the representatives lacked standing and that the matter presented a nonjusticiable political question.

Importantly, Judge Bates noted that neither the House nor the Senate had formally objected to Bush’s action as an institution. That mattered to his analysis. Individual members suing didn’t demonstrate institutional injury to Congress as a body.

The Kucinich litigation reveals both the barriers facing anyone who tries to litigate authority and the ways legal doctrine might have evolved since 2002. Standing requirements remain formidable. But Massachusetts v. EPA demonstrated greater willingness to afford broad standing in environmental cases. Zivotofsky showed courts willing to resolve separation-of-powers disputes involving foreign policy despite historical assumptions that such matters are uniquely unsuited to judicial resolution.

And the scale distinguishes the current situation from the ABM precedent. Bush withdrew from one agreement. Trump is exiting sixty-six simultaneously. If Congress formally objects through legislative action or institutional position-taking, courts might view the dispute differently—as a genuine interbranch conflict requiring resolution rather than an isolated policy disagreement.

Broader Implications for American Foreign Relations

The outcome of any legal confrontation over these actions will echo far beyond environmental agreements and women’s health organizations.

If courts hold that the executive possesses unilateral authority, future administrations will have largely unfettered power to exit such obligations. That makes America’s commitments less stable. Other nations will hesitate to negotiate with the United States, knowing that successive administrations might reverse course. Allies will demand shorter-term agreements with easy exit provisions. They’ll invest less in enforcing obligations against us.

International law itself becomes more fragile when a major power can exit agreements on executive whim. Legal scholars studying climate treaty withdrawal note that this affects not the specific agreements Trump targeted but the entire architecture of global cooperation.

Conversely, if courts hold that Congress retains authority over termination—either through symmetry principles or through its power to legislate constraints—the foreign relations balance shifts substantially. Congress becomes a chokepoint in foreign policy. The United States might find itself locked into obligations even when political winds shift and circumstances change.

Neither outcome is obviously superior. Unilateral authority creates instability in relations with other nations but preserves flexibility. Congressional involvement creates stability but risks paralysis. Which risk did the Constitution choose to run—and did the Framers’ silence mean they intended flexibility or simply didn’t anticipate this scenario?

The Political Calculus

Understanding whether Congress will fight back requires assessing political incentives, not legal authority alone.

Democrats have strong institutional reasons to defend congressional prerogatives against any administration they oppose. But Republicans controlling Congress face a different calculation. If the Republican executive is using authority to pursue policies Republicans support—exiting environmental agreements, de-emphasizing multilateral institutions, prioritizing sovereignty—why would they constrain that authority on abstract institutional grounds?

The answer is that some Republicans care about institutional prerogatives regardless of policy outcomes. The Kaine-Rubio NATO provision passed with bipartisan support precisely because senators understood that protecting congressional authority matters even when you agree with the policy goals. Today’s ally is tomorrow’s opponent, and institutional powers outlast any single administration.

Whether that same bipartisan concern exists for environmental agreements and gender equality organizations remains uncertain. Republicans may view those exits as victories rather than constitutional violations. But if even a handful of Republican senators decide that the scale of these actions crosses a constitutional line—that sixty-six simultaneous exits represents an assertion of power too extreme to let pass—Congress could assemble the votes to impose meaningful constraints.

When the Confrontation Might Happen

Legal confrontation appears more likely than immediate. Environmental groups have already indicated willingness to challenge terminations in court. The Center for Biological Diversity announced plans to explore litigation challenging the UNFCCC action.

But such litigation faces substantial hurdles. Standing requirements are brutal. Courts will demand to know what concrete injury an environmental group suffers from termination that could be fixed by judicial intervention. The political question doctrine remains available to judges who’d rather avoid this fight.

States might have stronger standing arguments. Coastal states facing impacts could sue on behalf of sovereign interests in protecting their territory. But courts would likely characterize such claims as asking the judiciary to second-guess foreign policy decisions—exactly what the political question doctrine is designed to prevent.

Congressional action appears more likely in the near term. If Democrats control one or both chambers, they could immediately introduce legislation asserting congressional authority or conditioning funding. Such legislation would likely fail to overcome a veto, but it would establish a legislative record and political position. Appropriations riders might prove more viable, since they often attract bipartisan support when framed as protecting institutional prerogatives.

The timeline for any legal confrontation would stretch across months or years. Federal litigation moves slowly. Appeals extend the process. If cases reached the Supreme Court, the justices would take time to consider implications carefully. But if a statutory provision genuinely prohibits termination and the executive proceeds anyway—say, if Congress passes legislation similar to the NATO statute for environmental agreements—litigation challenging those actions might move more swiftly.

The Question That Won’t Go Away

For nearly half a century since Goldwater v. Carter, authority has existed in practical acceptance but theoretical ambiguity. Administrations have exercised such authority repeatedly. Congress has generally acquiesced. Constitutional scholars have debated the matter in law reviews.

Now that debate has moved from academia into urgent reality. The scale and simultaneity of these actions, combined with contemporary evolution of standing doctrine and the political question doctrine, may have created an opportunity for resolution.

The Trump administration justifies its actions by invoking established practice and arguing that termination represents an exercise of executive power as fundamental to the diplomatic role as treaty-making. Critics counter that the Constitution’s requirement of Senate involvement in ratification cannot be evaded through unilateral authority.

As affected parties consider litigation strategies, Congress weighs its options, and the administration prepares legal defenses, the result will substantially reshape American constitutional law governing foreign relations. The legal battle ahead may finally force courts to answer what the Goldwater justices deliberately avoided.

Does the executive possess unilateral authority to withdraw from agreements the Senate has ratified, or does the Constitution retain a meaningful role for Congress in deciding when America’s obligations will end?

We’re about to find out.

Our articles make government information more accessible. Please consult a qualified professional for financial, legal, or health advice specific to your circumstances.