President Trump Donald John TrumpFederal prosecutor speaks out, says Barr 'has brought shame' on Justice Dept. Former Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick MORE holds a commanding lead over his Republican primary challengers in a new poll that shows former Massachusetts Gov. Bill Weld William (Bill) WeldRalph Gants, chief justice of Massachusetts supreme court, dies at 65 The Hill's Campaign Report: Biden visits Kenosha | Trump's double-voting suggestion draws fire | Facebook clamps down on election ads Biden picks up endorsements from nearly 100 Republicans MORE (R) leading other rivals.

The Economist-YouGov Poll released Wednesday shows that Trump has the support of 86 percent of Republican primary or caucus voters, compared to 5 percent for Weld. Former South Carolina Gov. Mark Sanford Mark SanfordOn The Money: Business world braces for blue sweep | Federal Reserve chief to outline plans for inflation, economy | Meadows 'not optimistic' about stalemate on coronavirus deal Trump critic Sanford forms anti-debt advocacy group Republicans officially renominate Trump for president MORE (R) was supported by 2 percent and former Rep. Joe Walsh Joe WalshSunday shows preview: Protests continue over shooting of Blake; coronavirus legislation talks remain at impasse Republicans officially renominate Trump for president Tucker Carlson responds to guest correcting pronunciation of Kamala Harris's name: 'So what?' MORE (R-Ill.) had 1 percent support.

Five percent of GOP primary or caucus voters were not sure who they supported and 1 percent said they would not cast ballots.

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The poll also found that 85 percent of Republican respondents viewed Trump favorably while just 12 percent viewed him unfavorably.

The results were based on responses from 416 GOP primary or caucus voters and 371 Republicans surveyed between Sept. 14 and Sept. 17.

Weld was the first person to challenge President Trump for the Republican nomination and was later joined by Walsh and Sanford in the race.