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10 big political upsets

Published On: Oct 24 2011 10:46:05 AM PDT   Updated On: Oct 22 2012 05:34:22 AM PDT

The polls and the pundits are already telling Americans what to expect this Election Day, but what happens when they're wrong? Here are 10 of the most surprising political upsets in U.S. history.

Harry S Truman
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White House/Reuters

The 1948 presidential election is probably the most famous political upset ever. Harry S. Truman (pictured) surprised everyone -- including the Chicago Tribune, which had already printed an edition saying he lost -- by beating Thomas E. Dewey. Truman and Dewey are pictured shaking hands after the election.

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