Republican presidential candidate Mitt Romney speaks during a campaign rally Tuesday in Las Vegas. Justin Sullivan/Getty Images hide caption

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A demonstrator holds a copy of the U.S. Constitution to his chest as he attends a protest in downtown San Antonio on March 23. Eric Gay/AP hide caption

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The American Dream has long evoked the idea that the next generation will have a better life than the previous one. Today, many Americans feel that dream is in jeopardy. H. Armstron Roberts/CORBIS hide caption

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Mitt Romney greets guests after addressing the Latino Coalition's 2012 Small Business Summit at the U.S. Chamber of Commerce on Wednesday. Mario Tama/Getty Images hide caption

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While a student at Harvard Law School, Barack Obama became the first black president of the Harvard Law Review. AP hide caption

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Mitt Romney already had a young family during his time at Harvard, which set him apart from most other students. Here, Romney is with his wife, Ann, and two sons at a business school clambake in 1973. Courtesy of The New York Times hide caption

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Sen. Ted Kennedy, D-Mass., and Republican challenger Mitt Romney (right) take part in a televised debate at Holyoke Community College in Holyoke, Mass., in 1994. Romney lost to Kennedy in his first political race. Charles Krupa/AP hide caption

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Republican presidential candidate Mitt Romney shakes hands with Sen. Marco Rubio, R-Fla., during a town hall-style meeting in Aston, Pa., on Monday. Jae C. Hong/AP hide caption

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Mitt Romney speaks at the 138th National Rifle Association of America meetings on May 15, 2009, in Phoenix. Christian Petersen/Getty Images hide caption

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President Obama has a chance to make fun of his opponents — and himself — when he addresses the annual White House Correspondents' Association gala later this month. Last year he joked about Donald Trump and the "birther" issue. Martin H. Simon-Pool/Getty Images hide caption

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Supporters of the health care law have recently embraced the term "Obamacare," a word they once recoiled from. Charles Dharapak/AP hide caption

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In this 2005 photo, then-Massachusetts Gov. Mitt Romney presents Afghan President Hamid Karzai with a memento at Boston's Logan Airport. Karzai was preparing to speak at Boston University's commencement. Dina Rudick /AP hide caption

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A screen shot of President Obama from the trailer for his campaign movie, The Road We've Traveled. BarackObama.com/YouTube hide caption

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A homemade bumper sticker on the back of a car during a Tea Party rally in Concord, N.H., Romney appeared on Sept. 4. Justin Sullivan/Getty Images hide caption

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