Georgia Gov. Brian Kemp led David Perdue by 11 percentage points in a fresh poll, casting doubt on the former senator’s prospects in a Republican primary contest with former President Donald Trump’s prestige on the line.

Kemp led Perdue 50% to 39% in a Fox News survey conducted March 2–6, with 10% “unsure.” The governor enjoyed a substantial lead and hit the all-important 50% mark with Republican primary voters across the state, despite Trump having endorsed Perdue upon his entry into the race in December. Both Kemp and Perdue garnered healthy favorable ratings in the poll, as did Trump, ahead of the May 24 primary.