How Presidential Delegates (Really) Work

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President Joe Biden announced on July 21, 2024 that he would not seek reelection. His departure ended his campaign, but it did not itself nominate a successor.

That decision went through delegates, the people who vote to choose a party’s presidential nominee at its national convention. Kamala Harris became the Democratic nominee through a virtual roll call, in which delegates voted electronically. Delegate voting closed on August 5, and the convention secretary certified the result.

The vote chooses a nominee, not a president

Convention delegates represent their state at a national party convention, where they vote on the party’s presidential nominee. In this context, a delegate is a representative in a party decision, not an Electoral College elector casting the state’s votes for president.

The major parties also use their national conventions to adopt platforms, set party rules and select vice-presidential nominees. A platform is the party’s statement of policy positions, so a delegate’s work extends beyond choosing the person at the top of the ticket.

The House and Senate have no formal institutional role in the nominating process, which is governed by the parties, according to the Congressional Research Service. National and state parties set the rules that determine how primary and caucus results award delegates.

In primaries, voters choose their preferred candidate through secret ballots, and the state takes the results into account to award delegates. Caucuses are party meetings that may use secret ballots or groups of participants supporting different candidates. These are two ways of turning voter preferences into support for a nominee, not two names for the same voting procedure.

How a primary result becomes delegate votes

Allocation decides how many delegates each candidate receives; selection, covered in the next section, decides which people fill those seats.

The Democratic Party’s 2024 Delegate Selection Rules required 75 percent of a state’s base delegation, a figure stated for each state in the party’s convention call, to be elected at the congressional district level or smaller and 25 percent at large. The call starts a state’s base delegation with its allocation of delegate votes, calculated from Democratic presidential votes and Electoral College votes, with separate provisions for bonus votes and pledged party-leader/elected-official additions. At-large delegates represent the state as a whole, while district-level seats preserve a local component of the result.

Those rules allocated district-level delegates in proportion to the primary or caucus vote each presidential preference won in that district. A preference, meaning a candidate or the uncommitted option, that fell below the 15 percent threshold received no delegates. Officials recalculated the vote shares after excluding preferences below 15 percent, then multiplied each qualifying share by the number of district delegates. They assigned the whole-number results first, then awarded any remaining delegates in order of the largest fractional remainders.

North Carolina’s delegate selection plan for that cycle allocated at-large positions using the statewide primary vote and also excluded preferences below 15 percent statewide. If no preference reached that threshold, the plan lowered it to half the front-runner’s percentage. District results and statewide results answer different questions, so the statewide winner alone cannot describe the whole delegation.

North Carolina’s 2024 plan separately listed pledged party leader and elected official delegates, commonly shortened to PLEOs, alongside district-level and at-large delegates. Those pledged seats were allocated to presidential preferences using the same statewide vote and 15 percent threshold as at-large seats.

For Republicans in 2024, Rule 16 required that any statewide presidential preference vote be used to allocate delegates and bind them to a candidate, proportionally or in a winner-take-all manner, for at least one round of convention balloting. Winner-take-all means the winner receives every delegate covered by that allocation, rather than a share based on the vote. The Rules of the Republican Party now posted, which govern the next convention, require proportional allocation in contests held before March 15 of the convention year. A state may set a vote threshold, no lower than 50 percent, above which a candidate may receive all the delegates.

California’s rule for its 2024 Republican primary awarded all 169 delegates to a candidate winning a statewide majority; without a majority, it distributed those delegates proportionally statewide. So a rule that divides delegates proportionally can still give every delegate to a majority winner.

Who fills the delegate seats

USAGov describes most selected delegates as active party members, party leaders or early supporters of a candidate.

North Carolina’s 2024 Democratic process allocated seats from the presidential primary, then elected district delegates at district conventions and statewide delegates at the state convention. Any registered Democrat in the state could apply by submitting a notice of candidacy and seeking support for election as a delegate.

The 2024 Democratic rules allowed presidential candidates to approve the people seeking pledged delegate seats. That gave a campaign influence over who would represent its allotted votes, not just how many votes it had won. North Carolina’s plan also used the election of at-large delegates, if necessary, to divide positions equally between men and women as far as mathematically practicable. The at-large election could also be used to meet the representation goals in the plan’s affirmative action and outreach sections.

Republican Rule 14 includes automatic convention seats for each state’s national committeeman, national committeewoman and state-party chair. Republican Rule 16 permits selection through primaries, state committees, state or congressional-district conventions and other methods consistent with its listed rules.

Florida’s 2024 Republican delegate instructions made delegates and alternates personally responsible for travel, lodging and dining expenses. Arizona Democrats’ convention cost guidance likewise required delegates to cover attendance costs, while allowing them to fundraise for expenses. One Florida Democratic delegate’s 2024 fundraiser described the convention seat as an unpaid volunteer position and sought help with travel, lodging and food. That is a documented example of unpaid service, not a nationwide pay rule: ask the state party whether your seat provides any compensation and who covers attendance costs. Raising money for expenses is different from earning a salary or a fee for serving as a delegate.

The Federal Election Commission’s delegate-activity guidance allows federal candidates serving as delegates to use campaign funds for their own convention-related travel, food and lodging. It also warns that delegate spending benefiting a presidential candidate can count toward the candidate contribution limit as an in-kind contribution, meaning something of value provided instead of money.

To seek a seat, contact the state party for its current delegate-selection plan, filing process and convention costs. In an open primary or caucus, voters do not have to register with that party to participate; in a closed contest, only voters registered with the party may vote. State and party rules also allow variations on those formats. Check the state election office as well as the party before relying on an old cycle’s instructions.

When delegates can change their vote

Being selected as a delegate does not necessarily make the person a free agent at the convention. The Democratic National Committee’s Call for the 2024 Democratic National Convention, the document that holds the convention’s procedural rules, instructed pledged delegates to reflect in good conscience the sentiments of the people who elected them.

Republican Rule 16 directs the convention secretary to record each delegate’s vote according to the delegate’s obligations under national rules, state law or state-party rules. It requires states seeking to unbind delegates after a candidate withdraws or suspends a campaign to specify the criteria in their filing with the Republican National Committee.

The U.S. Election Assistance Commission explains that party rules determine how delegates vote after a candidate withdraws and how many ballots their commitment lasts. There is no general rule that a withdrawn candidate’s delegates transfer to a successor, or that every delegate becomes free after the first ballot.

Democratic automatic delegates, often called superdelegates, hold seats through their offices, including party committee membership, governorships and seats in Congress, rather than through a pledge to a primary candidate. Superdelegates are not the same as the pledged party leader and elected official delegates described earlier, who are pledged to a candidate.

Under the 2024 Democratic call, automatic delegates could join the first presidential ballot only if the party secretary certified that a candidate had enough pledged delegates to constitute a majority of all pledged and automatic delegates. That exception allowed them to join a result that the pledged delegates alone could already carry, rather than tip an unresolved first ballot. If voting continued beyond the first ballot, both pledged and automatic delegates could participate on subsequent presidential ballots.

What happens when the nomination is unsettled

The 2024 Democratic call required a majority of the delegates eligible to vote on the ballot in question to choose the presidential nominee. Republican Rule 40 requires a majority of the votes entitled to be cast in the convention. A leading candidate can still fall short if the remaining delegate votes are divided among other preferences.

USAGov describes a convention without an incoming delegate majority as contested, with the nominee chosen through one or more rounds of voting.

The rules for the 2024 Democratic presidential nomination required a formal candidacy declaration, presidential qualifications and 300 delegate signatures, with no more than 50 from one delegation, to qualify for the ballot. The party’s July nomination procedures gave delegates ballots to express their preferences, and Harris qualified for the ballot through delegate petitions. Those requirements applied to any candidate for the nomination, so support for a successor to Biden was not itself the formal act of nomination.

Both parties have rules in place for the next cycle. On August 15, 2026, the full Democratic National Committee approved six early states to lead its 2028 presidential nominating calendar, along with the accompanying rules package. In order, the six are South Carolina, Nevada, New Hampshire, New Mexico, Michigan and Virginia.

The Republican National Committee’s rulebook, The Rules of the Republican Party, governs allocation and selection for the next national convention. That is the edition posted as of October 3, 2026. Rule 12 lets the Republican National Committee amend specified rules by a three-fourths vote of its entire membership, subject to committee approval and notice requirements. No such amendment may be adopted after September 30 two years before the year of the next convention.

Past-cycle examples explain the machinery; they should not be treated as a guarantee of the next cycle’s delegate totals, filing dates or state procedures. For an upcoming race, use the party’s rules for that cycle and the state’s own selection plan.

The next step is the Electoral College

Before the general election, state political parties generally nominate prospective elector slates at state conventions or choose them through a central-committee vote. Voters then select their state’s electors through their votes in the general election. Those people hold a different assignment from convention delegates: they participate in choosing the president after the parties have chosen their candidates.

The statewide popular-vote winner receives all of a state’s electors except in Maine and Nebraska, which award one elector per congressional district and two for the statewide winner. Electors meet in December to cast separate votes for president and vice president. A state can therefore have nomination rules that divide convention delegates and general-election rules that award its electors differently.

Some states require electors to vote according to the state’s popular vote, and some can fine, disqualify or replace an elector who breaks that pledge. For a question about the nomination, start with the party’s delegate plan; for a question about the November result, start with the state’s elector process.