Need some help with election results!

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http://en.wikipedia.org/wiki/United_States_presidential_election,_1824

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I know for a fact that there have been 4 instances in US election history where the candidate with fewer popular votes won the presidency.

I have managed to find 3 of these:

1876 - Rutherford B. Hayes defeated Samuel J. Tilden
1888 - Benjamin Harrison defeated Grover Cleveland
2000- George W. Bush defeated Al Gore

Can someone tell me what the 4th such instance was? I can't seem to find it.

Thanks.

1960 - John Fitzgerald Kennedy defeated Richard Milhous Nixon

Hey, how about 1880? That one had a closer popular vote.