Barack Obama

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President Barack Obama speaks at a campaign event at Nationwide Arena Monday, Nov. 5, 2012, in Columbus, Ohio. (AP Photo/Tony Dejak)

A little girl peeks from behind a man with an image of a smiling President Barack Obama as President Obama speaks at a campaign event at Nationwide Arena, Monday, Nov. 5, 2012, in Columbus, Ohio. (AP Photo/Carolyn Kaster)

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President Barack Obama makes a call as he visits a campaign office, Monday, Nov. 5, 2012, in the German Village section of Columbus, Ohio, to greet and make phone calls to volunteers. (AP Photo/Carolyn Kaster)

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President Barack Obama speaks at a campaign event at Nationwide Arena Monday, Nov. 5, 2012, in Columbus, Ohio. (AP Photo/Tony Dejak)

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President Barack Obama is hugged on stage by musician Jay-Z, center, as musician Bruce Springsteen, stands right, at a campaign event at Nationwide Arena, Monday, Nov. 5, 2012, in Columbus, Ohio. (AP Photo/Carolyn Kaster)

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Amara Hayles, 6, of Columbus, sits atop her dad, Marlon Hayles, shoulders and waves a American flag as President Barack Obama speaks at a campaign event at Nationwide Arena, Monday, Nov. 5, 2012, in Columbus, Ohio. (AP Photo/Carolyn Kaster)

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President Barack Obama walks up and onto the stage as the crowd cheers at a campaign event at Nationwide Arena, Monday, Nov. 5, 2012, in Columbus, Ohio. (AP Photo/Carolyn Kaster)

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** FILE ** In this April 5, 2011, file photo Israeli President Shimon Peres speaks to members of the media outside White House in Washington following his meeting with President Barack Obama. (AP Photo/Pablo Martinez Monsivais, File)

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David Axelrod (left), senior adviser for the Obama campaign, and David Plouffe, White House senior adviser, talk during a campaign event for President Obama on Nov. 2, 2012, at Springfield High School in Springfield, Ohio. (Associated Press)

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President Obama greets supporters during a campaign event near the Capitol in Madison, Wis., on Monday, Nov. 5, 2012. (AP Photo/Pablo Martinez Monsivais)

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With the Wisconsin Capitol dome behind him, President Obama speaks at a campaign event on Monday, Nov. 5, 2012, in downtown Madison, Wis. (AP Photo/Carolyn Kaster)

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** FILE ** Singer Stevie Wonder performs Nov. 4, 2012, at the Fifth Third Arena on the University of Cincinnati campus in Cincinnati before President Obama speaks at a campaign event. (Associated Press)

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Musician Dave Matthews performs Nov. 4, 2012, before the arrival of President Obama for a campaign rally at the Community College of Aurora, in Aurora, Colo. (Associated Press)

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Former President Bill Clinton speaks at a rally for Barack Obama at Pullen Park in Raleigh, N.C., Sunday, Nov. 4, 2012. The former president has been traveling to several battleground states over the past week to try to stem any Republican tide for Mitt Romney and preserve Obama leads. (AP/Ted Richardson)

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Singer Stevie Wonder performs before President Barack Obama speaks at a campaign event at the Fifth Third Arena on the University of Cincinnati campus, Sunday, Nov. 4, 2012, in Cincinnati. (AP Photo/Carolyn Kaster)