How does the Electoral College work?
The Electoral College is the constitutional process through which electors formally choose the President and Vice President of the United States. Rather than a single national election, voters participate in state-level contests that determine which slate of electors will cast their state's electoral votes.
- 538 total electors: 435 for House seats + 100 for Senators + 3 for Washington DC
- 270 to win: A candidate needs a majority of electoral votes
- Winner-take-all: 48 states and DC give all electors to the state's popular vote winner
- State-by-state: The presidency is won by assembling state victories, not by national vote totals
Where do the 538 electors come from?
Each state receives electoral votes equal to its total congressional representation: the number of House seats (based on population) plus two Senators. The Twenty-third Amendment (1961) granted the District of Columbia three electoral votes, the same as the least populous state.
| Component | Number | Basis |
|---|---|---|
| House representation | 435 | Apportioned by population after each census |
| Senate representation | 100 | Two per state regardless of population |
| District of Columbia | 3 | Twenty-third Amendment (equal to smallest state) |
| Total | 538 | Majority needed: 270 |
Electoral votes are reallocated following the decennial census and congressional reapportionment. The allocation used for the 2024 and 2028 elections is based on the 2020 Census. States like Texas and Florida gained electoral votes while states like New York and California lost seats.
How are electors chosen?
Voters do not directly elect the President. Instead, they vote in state-run popular elections that determine which slate of electors is appointed under state law. Each party nominates a slate of electors pledged to their candidate before Election Day.
In 48 states and DC, the candidate who wins the popular vote receives all of that state's electoral votes—the "winner-take-all" or "unit rule" system. This is not constitutionally required; states adopted it to maximise their influence.
Maine and Nebraska use a district method: two electoral votes go to the statewide winner, and one vote is awarded for each congressional district won. This occasionally produces split results—in 2020, Biden won one electoral vote from Nebraska's 2nd District while Trump won the state overall.
When do electors actually vote?
Electors meet in their own state capitals on the first Tuesday after the second Wednesday in December following Election Day. They do not gather as a single national body. Electors cast separate ballots for President and Vice President, and these certificates are transmitted to Congress.
The Electoral Count Reform and Presidential Transition Improvement Act (2022) clarified procedures for counting electoral votes and narrowed opportunities for congressional objection, responding to controversies from 2020.
What about "faithless electors"?
Most states require electors to vote for the candidate they pledged to support, and the Supreme Court ruled in Chiafalo v. Washington (2020) that states may enforce these pledges. "Faithless electors" who break their pledge are rare and have never changed an election outcome.
🎮 In Race for the White House
The simulation uses the 2020 Census electoral vote allocation. Your goal is to reach 270 electoral votes by winning states. The winner-take-all mechanic means narrow victories and landslides are worth the same number of electoral votes—making strategic targeting essential.
About this explainer
This explainer accompanies Race for the White House 2028, an educational simulation. The simulation's candidates, polling and campaign events are fictional and should not be interpreted as forecasts.
Last reviewed: January 2025