People in the audience cheer as Democratic presidential candidate Hillary Clinton speaks during a campaign event at a high school in Phoenix in March 2016 ahead of the Arizona primary. Carolyn Kaster/AP hide caption

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Carolyn Kaster/AP

Is Arizona A Swing State This Year?

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Russian President Vladimir Putin enters the St. George Hall of the Grand Kremlin Palace in Moscow. Sergei Ilnitsky/AFP/Getty Images hide caption

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Sergei Ilnitsky/AFP/Getty Images

How The Trump Campaign Weakened The Republican Platform On Aid To Ukraine

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Reince Priebus, chairman of the Republican National Committee, speaks to the delegates on start of the first day of the Republican National Convention. An estimated 50,000 people are expected in Cleveland, including hundreds of protesters and members of the media. Alex Wong/Getty Images hide caption

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NPR's Steve Inskeep interviews Speaker of the House Paul Ryan in the Speaker's conference room at the U.S. Capitol in Washington, D.C. Ariel Zambelich/NPR hide caption

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Republican presidential candidate Donald Trump arrives for a meeting with House Speaker Paul Ryan at the Republican National Committee Headquarters on Capitol Hill Thursday. Andrew Harnik/AP hide caption

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Andrew Harnik/AP

Time is running out for a conservative to launch a national third-party presidential campaign, as Ross Perot did in 1992. Doug Mills/AP hide caption

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Doug Mills/AP

Is It Too Late For A Third-Party Presidential Candidate To Run?

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Republican presidential candidate Donald Trump speaks at a campaign rally Monday in Wilkes-Barre, Pa. Trump won Tuesday's primary race in the state Mel Evans/AP hide caption

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Mel Evans/AP

Republican presidential candidates Donald Trump and Sen. Ted Cruz, R-Texas, argue a point during a Republican presidential primary debate at Fox Theatre in Detroit earlier this month. Paul Sancya/AP hide caption

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Paul Sancya/AP

Activist Donna Walker-Brown speaks at an event for black voters sponsored by the Republican Party in Cleveland in January. Nick Castele/WCPN/Ideastream hide caption

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Nick Castele/WCPN/Ideastream

Can GOP Strides With Black Voters Survive The 2016 Campaign?

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Republican presidential candidate Ben Carson has coffee with staff members during a campaign stop at The Airport Diner in Manchester, N.H. Matthew Cavanaugh/Getty Images hide caption

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Republican presidential candidate Jim Gilmore greets voters Tuesday outside the polling place at Webster School in Manchester, N.H. He got 134 votes in the Granite State, fewer than three bigger-name candidates who already had dropped out of the race. Scott Eisen/Getty Images hide caption

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Scott Eisen/Getty Images