Trump hits new high among registered Republicans in NBC poll
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GOP presidential front-runner Donald TrumpDonald John TrumpIvanka Trump pens op-ed on kindergartners learning tech Bharara, Yates tamp down expectations Mueller will bring criminal charges Overnight Cybersecurity: Equifax security employee left after breach | Lawmakers float bill to reform warrantless surveillance | Intel leaders keeping collusion probe open MORE now has the support of 40 percent of registered Republicans, gaining 4 points in an NBC News/Survey Monkey national weekly tracking poll to reach a new high just before voters go to the polls on Super Tuesday.

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Marco RubioMarco Antonio RubioOvernight Defense: Tillerson, Trump deny report of rift | Tillerson says he never considered resigning | Trump expresses 'total confidence' in secretary | Rubio asks Army to kick out West Point grad Rubio asks Army to kick out West Point grad with pro-communist posts GOP establishment doubts Bannon’s primary powers MORE added 5 points following his performance in the latest Republican debate, putting him at 21 percent in the online poll, released early Tuesday morning.

Ted CruzRafael (Ted) Edward CruzWhatever you think the Alabama special election means, you’re probably wrong This week: Congress gets ball rolling on tax reform Week ahead: Senators work toward deal to fix ObamaCare markets MORE, who’s in third place, slipped 1 point, to 18 percent, his lowest level in the survey.

Ben Carson ranks fourth, with 8 percent, while John Kasich follows, with 7 percent.

Pollsters also found that the overwhelming majority of GOP voters believe Trump will win their party's nomination.

About 71 percent predict Trump will become the Republican standard-bearer, up 15 points from a similar survey last week.

Rubio ranks second on that question, at 12 percent, while Cruz takes 10 percent, Carson 2 percent and Kasich 1 percent.

NBC News/Survey Monkey polled 8,759 registered Republican voters between Feb. 22 and 28. Their survey has a 1.8 percentage point margin of error.

Updated at 7:14 a.m.