យុទ្ធនាការអាមេរិក
President Barack Obama shakes hands following a speech at Florida Atlantic University, Tuesday, April 10, 2012. (AP)
The crowd cheers as President Barack Obama arrives to speak at Florida Atlantic University, in Boca Raton, Florida, April 10, 2012. (AP)
Republican presidential candidate, former Massachusetts Gov. Mitt Romney, waves before addressing an audience during a campaign event, in Warwick, Rhode Island, April 11, 2012. (AP)
President Barack Obama reaches out to shake hands with Lorain County Community College student Bronson Harwood after speaking at the college in Elyria, Ohio, April 18, 2012.
Supporters wait for Republican presidential candidate Mitt Romney to appear at a political rally in Manchester, New Hampshire April 24, 2012. (Reuters)
President Barack Obama and first lady Michelle are saluted by soldiers as they arrive at Fort Stewart in Georgia, April 27, 2012. (AP)
Republican presidential candidate, former Massachusetts Gov. Mitt Romney, accompanied by former New York City Mayor Rudy Giuliani, picks up pizza for firefighters in New York, May 1, 2012. (AP)
President Barack Obama gets a high five as he greets troops at Bagram Air Field, Afghanistan, early Wednesday, May 2, 2012. (AP)
A woman wears a campaign button to support Republican presidential candidate, former Massachusetts Gov. Mitt Romney at a campaign stop in Portsmouth, Virginia, May 3, 2012. (AP)
Supporters participate in a wave as they wait for President Barack Obama and his wife, Michelle, during a campaign rally at Virginia Commonwealth University in Richmond, Virginia, May 5, 2012. (AP)
Hortencia Wilcox of Allen, Texas wears a hat signed by Republican presidential candidate, former Massachusetts Gov. Mitt Romney while waiting in line at a campaign stop in Fort Worth, Texas, June 5, 2012. (AP)
A woman displays four fingers as she chants for four more years while President Barack Obama speaks at a fundraising reception in Baltimore, Maryland, June 12, 2012. (AP)
Republican presidential candidate Mitt Romney campaigns at Carter Machinery Company, Inc., in Salem, Virginia, June 26, 2012. (AP)
President Barack Obama places an order at The Varsity restaurant in Atlanta, Georgia, June 26, 2012. (AP)