American presidential elections are not decided by a single national popular vote — they are decided by 538 electors spread across 50 states and Washington, D.C., and whoever wins a majority of them wins the presidency. It is a system most people have heard of and few can actually explain, largely because it works nothing like a normal election tally.
Where the Number 538 Comes From
Every state gets a number of electors equal to its total representation in Congress: one for each member of the House of Representatives, plus two for its senators. That means every state gets at least three electoral votes, no matter how small its population, since every state has at least one House member and two senators. Washington, D.C. adds three more electors under the 23rd Amendment, even though it has no voting members of Congress. Add it all up — 435 House seats, 100 Senate seats, and D.C.’s three — and the total is 538. A candidate needs 270, just over half, to win.
Winner-Take-All, With Two Exceptions
In 48 states and Washington, D.C., the system is winner-take-all: whichever candidate wins the most votes in that state gets every one of its electoral votes, even if the margin is razor-thin. Maine and Nebraska do it differently, awarding one electoral vote to the winner of each congressional district and their remaining two votes to the statewide winner — which occasionally lets those two states split their electoral votes between candidates.
Why a State’s Population Does Not Translate Directly
Because every state gets a two-vote floor for its senators regardless of population, smaller states end up with more electoral weight per resident than larger ones. A vote in a small state can carry more mathematical influence in the Electoral College than a vote in a populous one, even though both cast exactly one ballot. This structural quirk is also the mechanism behind a result many people find confusing: a candidate can win the national popular vote and still lose the presidency, something that has happened five times in U.S. history, including in two recent elections.
What Happens After Election Day
The vote tally on election night is really a projection of each state’s electors, not the final legal step. The actual electors meet in their respective state capitals on the Monday after the second Wednesday in December to formally cast their votes. Congress then convenes on January 6 to count and certify those votes. If no candidate reaches 270 — a rare but real possibility — the 12th Amendment sends the decision to the House of Representatives, where each state delegation casts a single vote, regardless of how many members it has.