Nearly half of Republicans think President Trump won the popular vote in the 2016 presidential election, according to a new survey.

A poll conducted by two academic authors and published by The Washington Post shows 47 percent of Republicans believe Trump won the popular vote.

About three-quarters of Republicans, 73 percent, said voter fraud happens somewhat or very often, according to the poll.

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The poll was conducted from June 5 to 20 among 1,325 Americans. The survey focused on the 650 respondents who said they identified with or leaned toward the Republican Party.

Trump lost the popular vote during the 2016 presidential election to Democratic rival Hillary Clinton Hillary Diane Rodham ClintonJeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Momentum growing among Republicans for Supreme Court vote before Election Day Warning signs flash for Lindsey Graham in South Carolina MORE.

Trump has in the past claimed that millions of illegal votes were cast in the election, a claim that many officials have rebuked.

Earlier this year, Trump created the Election Integrity Commission to investigate his claims of voter fraud.

A similar poll last month showed 49 percent of Trump voters think he won the popular vote. But the Politico/Morning Consult poll conducted showed that overall, 59 percent of voters think Clinton won the popular vote.