A new poll shows Sen. Thad CochranThad CochranLawmakers push one-week stopgap funding bill Picking 2018 candidates pits McConnell vs. GOP groups Overnight Defense: FBI chief confirms Trump campaign, Russia probe | Senators push for Afghan visas | Problems persist at veterans' suicide hotline MORE (R-Miss.) vulnerable to a primary challenge if he decides to run for reelection next year.
And voters are split on how they feel about Cochran, with 45 percent approving of his job performance, while 42 percent disapprove. Fifty-five percent of respondents say they would like the GOP candidate for Senate next year to be more conservative than Cochran.
Cochran hasn't yet announced his decision on running, but is expected to do so at the end of this month.
If he does decide against it, a wide range of Republicans are expected to enter the race. McDaniel takes a slight lead in a seven-person field, with a quarter of the votes. Close behind him is Secretary of State Delbert Hosemann, who takes 23 percent support.
The survey was conducted among 422 GOP primary voters from Nov. 15-17.