Poll: Most Republicans think Trump will win nomination

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A majority of Republican voters believe that Donald TrumpDonald TrumpTrump praises Gingrich for going after Megyn Kelly: 'We don't play games' State Dept. months late on explaining Clinton aide's missing emails Florida poll: Clinton leads Trump by 3 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.

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 RubioFlorida poll: Clinton leads Trump by 3 The media is rigging the election by reporting WikiLeaks emails Poll: Trump up by 2 points in Florida MORE (R-Fla.) and Sen. Ted CruzTed CruzThe media is rigging the election by reporting WikiLeaks emails The Trail 2016: An important lesson in geography Webb: The race to 270 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.