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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"When Mexico sends its people, they're not sending their best. ... They're bringing drugs; they're bringing crime, [bringing] their rapists. And some, I assume, are good people," Donald Trump said while announcing his campaign last month. Paul J. Richards/AFP/Getty Images hide caption

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Protesters close their eyes in silent prayer as they stand on the South Carolina Statehouse steps during a rally to take down the Confederate flag, Saturday, June 20, 2015, in Columbia, S.C. Rainier Ehrhardt/Associated Press 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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Republican presidential hopeful Sen. Marco Rubio, R-Fla., speaks Wednesday before the Council on Foreign Relations in New York, where he laid out his "Rubio Doctrine." Mary Altaffer/AP hide caption

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Republican presidential hopeful Sen. Ted Cruz speaks at the Republican Leadership Summit Saturday in Nashua, N.H. Jim Cole/AP hide caption

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A protester in front of Sen. Marco Rubio's Doral, Fla., office in 2013 urges Rubio to stop opposing the inclusion of lesbian, gay, bisexual and transgender families in the Senate's immigration bill. Joe Raedle/Getty Images hide caption

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Senate Foreign Relations Committee member Sen. Marco Rubio, R-Fla., questions Secretary of State John Kerry on Capitol Hill last month. In an interview with NPR, Rubio reiterated his opposition to President Obama's dealings with Iran and Cuba. Pablo Martinez Monsivais/AP hide caption

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Marco Rubio celebrates onstage with his family in 2010 after winning his U.S. Senate seat in Florida when he was just 39 years old. Now, he's expected to embark on a run for president. Alan Diaz/AP hide caption

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