Here are five of the closest presidential races in U.S. history since 1840 as compiled by Yahoo!.
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Library of Congress
Similar to the 2000 election, the winner of the popular vote did not win this election. In fact, the contest was ultimately decided in Hayes' favor by a panel of administrators, much like how the Supreme Court decided the election of 2000. The panel's 8-7 decision was split down party lines, with the Republican Hayes declared the winner.