Kentucky Republican Gov.-elect Matt Bevin campaigns at a Louisville Chick-fil-A in May. David Stephenson/AP hide caption

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Preparations underway in the Media Center at the third Republican debate on the campus of the University of Colorado in Boulder, Colo. Robyn Beck/AFP/Getty Images hide caption

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This 1856 drawing depicts Rep. Preston Brooks of South Carolina beating Sen. Charles Sumner of Massachusetts in one of the bloodiest political fights in history. Boston Public Library/Flickr Creative Common hide caption

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Republican presidential candidate Rand Paul wants to run for both his Kentucky Senate seat and the White House, but a current state law prohibits him from doing so. Charles Krupa/AP hide caption

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A supporter waves a Cuban flag in front of the country's embassy after it reopened for the first time in 54 years on July 20 in Washington, D.C. The embassy was closed in 1961 when U.S. President Dwight Eisenhower severed diplomatic ties with the island nation after Fidel Castro took power in a communist revolution. Mark Wilson/Getty Images hide caption

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In a campaign video, Rand Paul uses a chainsaw to shred 1,700 pages of what he says represents the federal tax code. Paul is offering a flat-tax plan that fits on one page. Rand Paul campaign video hide caption

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Sen. Lindsey Graham, R-S.C., speaks to members of the media after visiting the memorial site at the Emanuel African Methodist Episcopal Church in Charleston, S.C., where nine people were killed. John Taggart/EPA/Landov hide caption

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Former Florida Gov. Jeb Bush poses with supporters for photos during a fundraiser in May. Alan Diaz/AP hide caption

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