thhomas jefferson was elected by 1 vote by the house of representatives after he tied in the electoral college
One vote kept him from beating John Quincy Adams for President. -Brandon and Codi
One vote kept President James Monroe from being elected president without dispute by the electoral college.
In 1824 - Andrew Jackson won the presidential popular vote but lost by one vote in the House of Representatives to John Quincy Adams after an electoral college dead-lock.
War against Mexico
President Polk's request for a declaration of war on Mexico was passed by one vote
Andrew Johnson's Impeachment
President Andrew Johnson was Impeached but not convicted because the Senate was one vote shy of the necessary two thirds required. Sean Rielly
in 1876, it was one vote that declared Rutherford B. Hayes as the 19th president of the United States.
Quebec General Election
In Saint-Jean there was a tie between a liberal candidate Michel Charbonneau and PQ candidate Roger Paquin. A new election was held on October 24 and was won by Paquin.
Vermont State representative Sydney Nixon was seated as an apparent one vote winner, 570 to 569. Mr. Nixon resigned when the State House determined, after a recount, that he had actually lost to his opponent Robert Emond 572 to 571. Adam and Nate
George W. Bush
November 7, 2000
The 2000 election on November 7, 2000 was the closest presidential race in history. In the final count George W. Bush of Texas won by 4 electoral votes. - Logan Potter and Shayla Prior
Mary Franson vs. Bob Cuniff
The Minnesota House District race had a single vote difference on election night with Mary Franson who had 10,652 and Bob Cuniff who had 10,651
Provoncha Becomes President
He is awesome so 'Murica smartened up and elected him. Provoncha