Supporters of Democratic presidential candidate Sen. Bernie Sanders, I-Vt., cheer at a campaign rally in Portland, Maine. Sanders is packing 'em in: 10,000 people in Madison, Wis.; more than 2,500 in Council Bluffs, Iowa; another 7,500 in Portland. Robert F. Bukaty/AP hide caption

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Members of the media are kept behind a moving rope line as Democratic presidential candidate Hillary Clinton marches in a Fourth of July parade in Gorham, N.H. Robert F. Bukaty/AP 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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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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Rep. Marcy Kaptur, D-Ohio, and fellow Democratic members of Congress hold a news conference to voice their opposition to the Trans-Pacific Partnership trade deal. Chip Somodevilla/Getty Images 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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Golden State Warriors guard Stephen Curry and his daughter Riley attend a news conference after Game 5 of the NBA Western Conference finals. Curry should be seen as a role model, pundits say. Ben Margot/AP hide caption

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Sen. Ted Cruz, R-Texas, apologized Wednesday after making a joke about Joe Biden while the vice president was mourning the death of his son. Charles Dharapak/Associated Press hide caption

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Former Maryland Gov. Martin O'Malley as he announces his intention to seek the Democratic presidential nomination during a speech in Federal Hill Park in Baltimore, Md. Jim Bourg/Reuters/Landov hide caption

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