Thirty-seven percent of Republican primary voters say they would consider a third-party candidate if faced with a general election matchup between Hillary Clinton Hillary Diane Rodham ClintonWhat Senate Republicans have said about election-year Supreme Court vacancies Bipartisan praise pours in after Ginsburg's death Trump carries on with rally, unaware of Ginsburg's death MORE and Donald Trump Donald John TrumpObama calls on Senate not to fill Ginsburg's vacancy until after election Planned Parenthood: 'The fate of our rights' depends on Ginsburg replacement Progressive group to spend M in ad campaign on Supreme Court vacancy MORE, according to an NBC News exit poll on Tuesday.

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As primary voters in Florida, Illinois, Missouri, North Carolina and Ohio finish their ballots, NBC News polled Republicans and reported that 71 percent said they will or probably will vote for front-runner Trump if he is the eventual nominee, compared to 27 percent who would not.

Some 57 percent say they would be satisfied with a Trump-Clinton faceoff in November.