Barack Obama

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President Barack Obama speaks during a campaign event at the Ohio State University Oval on Tuesday, Oct. 9, 2012, in Columbus, Ohio. (AP Photo/Tony Dejak)

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President Obama speaks during a campaign event on Monday, Oct. 8, 2012, in San Francisco. (AP Photo/Noah Berger)

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President Obama and Helen F. Chavez, widow of Cesar Chavez, places a special red rose at the Chavez grave site in Keene, Calif., on Oct. 8, 2012. (Associated Press)

President Obama and Helen F. Chavez, widow of Cesar Chavez, places a special red rose at the Chavez grave site in Keene, Calif., on Oct. 8, 2012, as he tours the Cesar E. Chavez National Monument Memorial Garden. (Associated Press)

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A supporter of President Obama holds a photo of Cesar Estrada Chavez on Oct. 8, 2012, while waiting for the president to announce the establishment of the Cesar E. Chavez National Monument in Keene, Calif. (Associated Press)

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Supporters leave with signs from President Obama's campaign event Friday, Oct. 5, 2012, at George Mason University in Fairfax, Va. (Craig Bisacre/The Washington Times)

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President Obama greets supporters at a campaign event Friday, Oct. 5, 2012, at George Mason University in Fairfax, Va. (Craig Bisacre/The Washington Times)