Trump holds 21-point lead in new national poll
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GOP presidential front-runner Donald TrumpDonald John TrumpConservatives express concern over House GOP immigration bill Poll: McSally holds 14-point lead in Arizona GOP Senate primary Trump defends Nielsen amid criticism over family separations MORE holds a 21-point lead over primary rival Ted CruzRafael (Ted) Edward CruzConservatives express concern over House GOP immigration bill GOP senators introduce bill to prevent family separations at border Senate GOP tries to defuse Trump border crisis MORE, a new national poll finds.

A new NBC News/SurveyMonkey online tracking poll released Tuesday found Trump leading the Texas senator, 48 percent to 27 percent. Ohio Gov. John Kasich, who gained 2 points since last week, follows with 18 percent.

When it comes to the possibility of a contested convention, the survey found that a majority of registered Republicans and those who lean Republican, 57 percent, believe that Trump should win the nomination if he wins a plurality of delegates, even if he fails to capture a majority of delegates.

The survey also shows 52 percent of those same voters are happy with a general election match-up between Trump and Democratic presidential front-runner Hillary ClintonHillary Diane Rodham ClintonLewandowski says 'womp womp' at story of young girl being separated from mother at border Giuliani: FBI asked me about tease of a 'surprise' before election Republicans tear into IG finding on Clinton probe MORE, while 30 percent would consider a third party candidate.

The poll was conducted online March 21–27 and surveyed 6,521 adults, including 5,741 who say they’re registered voters.