A new Texas Public Opinion Research survey in finds Ken Paxton (R) leads Sen. John Cornyn (R) in their U.S. Senate runoff, 48% to 40% with 11% undecided.

Key takeaway: A Trump endorsement isn’t enough to flip the race. If Trump endorses Cornyn, Paxton still leads 45% to 42%. A Trump endorsement of Paxton would widen his lead to 55% to 35%. 49% of likely Republican runoff voters say a Trump endorsement would not influence their vote at all or not much.