Republican presidential candidates stand on stage before the main debate Wednesday, September 16, at the Reagan Presidential Library in Simi Valley, California. From left to right are former U.S. Sen. Rick Santorum, former New York Gov. George Pataki, U.S. Sen. Rand Paul, former Arkansas Gov. Mike Huckabee, U.S. Sen. Marco Rubio, U.S. Sen. Ted Cruz, retired neurosurgeon Ben Carson, businessman Donald Trump, former Florida Gov. Jeb Bush, Wisconsin Gov. Scott Walker, businesswoman Carly Fiorina, Ohio Gov. John Kasich and New Jersey Gov. Chris Christie.
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House Speaker John Boehner, second from right, participates in a walk-through of the U.S. Capitol's Statuary Hall on Wednesday, September 16. In the foreground is a statue of Junipero Serra, an 18th-century friar who Pope Francis will canonize during his trip to the United States this month.
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Democratic presidential candidate Hillary Clinton sits with diners at a campaign event in Laconia, New Hampshire, on Thursday, September 17.
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Republican presidential candidate Carly Fiorina thanks the audience as she walks off stage with South Carolina Gov. Nikki Haley at the Heritage Action "Take Back America" forum Friday, September 18, in Greenville, South Carolina.
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A woman walks past a caricature of Donald Trump before the Republican presidential debate in Simi Valley, California, on Wednesday, September 16.
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Republican presidential candidate Jeb Bush poses for a photograph during a college-football tailgate party in Athens, Georgia, on Saturday, September 19.
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Comedian Jon Stewart, second from left, chats with first responders from New York City on Wednesday, September 16, before an event in Washington urging U.S. lawmakers to renew the James Zadroga 9/11 Health and Compensation Act. The law, enacted in 2010, provides health care benefits to first responders afflicted with illness as a result of the September 11 terrorist attacks. It is named for Zadroga, a New York City police officer who died of a respiratory disease in 2006 that was linked to his work at Ground Zero. The law is set to expire at month's end.
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Homemade cupcakes are decorated with the names of presidential candidates before the Republican debate Wednesday, September 16, in Simi Valley, California.
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Senate Majority Leader Mitch McConnell walks through the halls of Congress after speaking to the media on Wednesday, September 16.
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Actor Mark Ruffalo holds a glass of water as he introduces U.S. Sen. Bernie Sanders during an a town-hall event in New York on Friday, September 18. Sanders is running for the Democratic Party's presidential nomination.
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U.S. Sen. Rand Paul, a Republican presidential hopeful, speaks to supporters in Las Vegas on Thursday, September 17.
L.E. Baskow/Las Vegas Sun/AP
From left, Democratic U.S. Sens. Elizabeth Warren, Debbie Stabenow, Charles Schumer and Mark Warner prepare for a news conference Thursday, September 17, to call on congressional Republicans "to support tax loophole closures."
Tom Williams/CQ Roll Call/AP
Presidential candidates and their representatives join journalists for interviews following the Republican debate at the Reagan Library on Wednesday, September 16. See more behind-the-scenes photos from the debate
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Among those attending the Republican debate was actor and former California Gov. Arnold Schwarzenegger.
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Democratic presidential candidate Hillary Clinton waves to the audience at a campaign organizing meeting in Portland, Maine, on Friday, September 18.
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U.S. Sen. Lindsey Graham, a Republican presidential candidate, speaks during a roundtable event in West Des Moines, Iowa, on Friday, September 18.
Charlie Neibergall/AP
Students from Liberty University pray Monday, September 14, before U.S. Sen. Bernie Sanders gave a speech at the Christian school in Lynchburg, Virginia. Sanders acknowledged differences on social issues but argued they can agree on income inequality.
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Republican presidential candidate Donald Trump speaks in Los Angeles during a campaign rally aboard the USS Iowa on Tuesday, September 15.
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President Barack Obama walks across the South Lawn of the White House on Wednesday, September 16. He had just visited Walter Reed Medical Center to visit wounded service members.
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A man walks through a hallway of the Reagan Library in Simi Valley, California on Wednesday, September 16.
