President Barack Obama delivers a eulogy at the funeral for former Delaware Attorney General Beau Biden, son of Vice President Biden, at St. Anthony of Padua Church in Wilmington last weekend. Reuters U.S. Speaker of the House Rep. John Boehner wipes tear as House Minority Leader Rep. Nancy Pelosi looks on during a ceremony to award the Congressional Gold Medal posthumously to Constantino Brumidi July 11, 2012 on Capitol Hill in Washington, DC. Brumidi was awarded with the medal for his many artistic contributions to the United States Capitol. Alex Wong/Getty U.S. President George W. Bush tears up during a ceremony to present the Medal of Honor posthumously to Navy SEAL Petty Officer Michael Monsoor, in the East Room of the White House in Washington April 8, 2008. Monsoor died after diving onto a grenade during an attack on his combat team's sniper nest on September 29, 2006 in Ramadi, Iraq. Jason Reed / Reuters Former U.S. President Bill Clinton is seen here crying during ceremonies for the opening of the Flight 93 National Memorial and also marking the 10th anniversary of the 9/11 attack in Shanksville, Pennsylvania, September 10, 2011. Jason Cohn / Reuters Democratic presidential hopeful U.S. Sen. Hillary Clinton (D-NY) waters up—but only from a coughing fit—during a roundtable discussion at Yale Child Study Center February 4, 2008 in New Haven, Connecticut. With one day to go until Super Tuesday, Clinton is continuing to campaign throughout the United States. Justin Sullivan/Getty Republican presidential candidate and former Speaker of the House Newt Gingrich wipes away a tear while speaking about his deceased mother during a question and answer forum put together by Moms Matter 2012 at Java Joe's, a coffee shop, on December 30, 2011 in Des Moines, Iowa. The GOP presidential contenders are crisscrossing Iowa in the final stretch of campaigning in the state before the January 3rd caucus, the first test the candidates must face before becoming the Republican presidential nominee. Andrew Burton/Getty