Sen. Bernie Sanders, I-Vt., recently raised nearly as much money as his rival for the Democratic presidential nomination. The Sanders campaign says it raised $26 million in the last three months. Hillary Clinton's campaign says it raised $28 million in that time. Chip Somodevilla/Getty Images hide caption

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Republican presidential candidate Donald Trump appears at a Sept. 9 rally against the Iran nuclear deal on the West Lawn of the U.S. Capitol. Chip Somodevilla/Getty Images hide caption

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In 1928, Alfred E. Smith became the first Catholic nominated for president. He lost, in large part because of suspicions of what some called "papism" or the party of "rum, Romanism and rebellion." AP hide caption

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Pressure is building within House Speaker John Boehner's conference to oust him. Boehner is likely to hold off a challenge — for now. But he could decide to call it quits at the end of this term. Susan Walsh/AP hide caption

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Republican presidential candidate Carly Fiorina walks onstage followed by Scott Walker, Jeb Bush and other candidates in Wednesday's debate. Sandy Huffaker/Getty Images hide caption

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Former Texas Gov. Rick Perry suspended his campaign Friday. He's shown here at a campaign event in Fort Dodge, Iowa, earlier this summer. Charlie Neibergall/AP hide caption

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Democrat Hillary Clinton has been dealing with her ongoing email saga. It has gone on for months and has stuck. Compare that with Republican Donald Trump. All of his controversies have seemed to roll off him. Carolyn Kaster/AP hide caption

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A woman looks on at the U.S. Capitol in 2013 after the most recent government shutdown. Congress has made no progress toward avoiding a government shutdown when it will run out of funding Sept. 30. Jacquelyn Martin/AP hide caption

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Sen. Bernie Sanders, I-Vt., has gotten some of the biggest and most devoted crowds of the 2016 presidential race, including in Portland, Ore., this month, where he drew more than 19,000. Troy Wayrynen/AP hide caption

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