A majority of Republican voters believe that Donald Trump Donald John TrumpBubba Wallace to be driver of Michael Jordan, Denny Hamlin NASCAR team Graham: GOP will confirm Trump's Supreme Court nominee before the election Southwest Airlines, unions call for six-month extension of government aid 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.

ADVERTISEMENT

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.

A 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 Rubio Marco Antonio RubioMurky TikTok deal raises questions about China's role Sunday shows preview: Justice Ginsburg dies, sparking partisan battle over vacancy before election Florida senators pushing to keep Daylight Savings Time during pandemic MORE (R-Fla.) and Sen. Ted Cruz Rafael (Ted) Edward CruzThe Hill's Morning Report - Sponsored by Facebook - Washington on edge amid SCOTUS vacancy Murkowski: Supreme Court nominee should not be taken up before election Battle lines drawn on precedent in Supreme Court fight 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.