The Election Decided by 500 Votes: The Election of 2000

While many news outlets had already called the crucial swing state of Florida for Vice President Al Gore on election night 2000, it was eventually Texas Governor George W Bush who got those 25 electoral votes. After two recounts, the second stopped partway through by the Supreme Court, the final tally had Bush up over Gore by just 537 (!) votes in the state, getting him the presidency.