Barack obama 2012 09 10

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Obama votes early in Chicago as he leads Ohio polls

The Obama campaign says president's decision is part of effort to get supporters to polls early this year.

President Barack Obama is upbeat, gaining in the polls after the Democratic National Convention, but Republicans are calling that just a "sugar high." Here Obama is at St. Petersburg College September 8, 2012 in St Petersburg, Florida.

Chip Somodevilla

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