Trump holds 21-point lead in new national poll
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GOP presidential front-runner Donald TrumpDonald John TrumpKoch-backed group launches six-figure ad buy against Heitkamp Anti-abortion Dem wins primary fight Lipinski holds slim lead in tough Illinois primary fight MORE holds a 21-point lead over primary rival Ted CruzRafael (Ted) Edward CruzCruz says Cambridge Analytica assured him its practices were legal Dem battling Cruz in Texas: ‘I can understand how people think this is crazy’ Overnight Tech: Facebook faces crisis over Cambridge Analytica data | Lawmakers demand answers | What to watch for next | Day one of AT&T's merger trial | Self-driving Uber car kills pedestrian 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 ClintonKoch-backed group launches six-figure ad buy against Heitkamp Trump keeps up 'low IQ' attack on Maxine Waters GOP leaders to Trump: Leave Mueller alone 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.