Barack Obama in a 1975 photo from the Punahou School yearbook. He and his eighth-grade homeroom classmates pose with a slide projector as part of the yearbook's theme of "Nostalgia." Punahau School 1974-1975 Yearbook hide caption

itoggle caption Punahau School 1974-1975 Yearbook

President Obama addresses a joint session of Congress while delivering his State of the Union speech in 2011. During his first two years in office, Obama used big Democratic majorities in Congress to muscle through major legislation, but since the 2010 midterm elections, he's increasingly been stymied by a wall of GOP opposition. Chip Somodevilla/Getty Images hide caption

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Mitt Romney, then the governor-elect of Massachusetts, walks into the House chambers during inaugural ceremonies at the Statehouse in Boston, on Jan. 2, 2003. Elise Amendola/AP hide caption

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President Obama is applauded after signing the health care overhaul during a ceremony in the White House on March 23, 2010. Then-Gov. Mitt Romney signs a Massachusetts health care overhaul at Faneuil Hall in Boston on April 12, 2006. Win McNamee/Boston Globe via 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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Barack Obama, then a Democratic candidate for a U.S. House seat, delivers his concession speech to supporters, while his wife, Michelle, tends to their daughter, Malia, on March 21, 2000, in Chicago. Frank Polich/AP 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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Former Massachusetts Gov. Mitt Romney and President Obama will spend the next six months highlighting their differences. But they also share some striking similarities. Chip Somodevilla/Olivier Douliery/Getty Images hide caption

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