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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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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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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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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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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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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A screenshot of Florida Congressman Mario Diaz-Balart Spanish-language response to the State of the Union address, which has a different message on immigration than the one in South Carolina Gov. Nikki Haley's response speech. Conferencia GOP via YouTube/Screenshot by NPR hide caption

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Latino Reaction Split On Republicans' Spanish Language Message

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"There's a reason everybody's looking at Paul — he is the consensus choice," fellow Wisconsin Republican Sen. Ron Johnson said of Rep. Paul Ryan. "Other people may be able to step up to the plate, may be able to forge that consensus. But we already know Paul has already forged it." Chip Somodevilla/Getty Images hide caption

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Meet Paul Ryan, The Man Who Might Be House Speaker

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Republican presidential candidate, businesswoman Carly Fiorina speaks during the CNN Republican presidential debate at the Ronald Reagan Presidential Library and Museum on Sept. 16, 2015. Mark J. Terrill/AP hide caption

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Fiorina As CEO: 'Colossal Failure' Or 'The Right Leader'?

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