Poll: Most Republicans think Trump will win nomination
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A majority of Republican voters believe that Donald TrumpDonald John TrumpPossible GOP challenger says Trump doesn't doesn't deserve reelection, but would vote for him over Democrat O'Rourke: Trump driving global, U.S. economy into recession Manchin: Trump has 'golden opportunity' on gun reforms MORE will be their party’s presidential nominee, according to a Rasmussen poll released Friday.

The poll found that 57 percent of Republican voters think Trump is likely to win the nomination, up from 27 percent two months ago, when the billionaire businessman officially launched his campaign.

Only 15 percent of Republican voters see a Trump nomination as "not at all likely," down from 29 percent over the same span.

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Among all voters, 49 percent believe Trump will be the Republican candidate for president, up from 23 percent.

Voter confidence in Trump may be a reflection of national polls that have the businessman up by double-digits in the Republican primary.

RealClearPolitics average of polls has Trump leading the primary field with 22 percent support, followed by former Florida Gov. Jeb Bush at 10 percent and retired neurosurgeon Ben Carson at 9 percent. Wisconsin Gov. Scott Walker, Sen. Marco RubioMarco Antonio RubioTrump moves forward with F-16 sale to Taiwan opposed by China The Hill's Morning Report — Trump and the new Israel-'squad' controversy Trump crosses new line with Omar, Tlaib, Israel move MORE (R-Fla.) and Sen. Ted CruzRafael (Ted) Edward CruzTrump moves forward with F-16 sale to Taiwan opposed by China The Hill's Campaign Report: Battle for Senate begins to take shape O'Rourke says he will not 'in any scenario' run for Senate MORE (R-Texas) are tied for fourth with 7 percent each.

The Rasmussen poll surveyed 1,000 likely voters from Aug. 19-20 and has a 3-point margin of error.