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 (R) was supported by 2 percent and former Rep. Joe Walsh (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.
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.