Some Republicans are growing anxious that incumbent Sen. John Cornyn (R-Texas) could be ousted in the competitive Texas GOP primary for Senate, giving Democrats a rare opening in the red Lone Star State this fall.

As James Talarico gains steam in the Democratic primary against Rep. Jasmine Crockett (D-Texas), across the aisle, Cornyn and some national Republicans are warning of a general election “massacre” for the party if Texas Attorney General Ken Paxton, who is leading the GOP race in recent polling, ends up at the top of their ticket.

The possibility of an endorsement from Trump looms as a potential game changer in the tight race, but Trump was still undecided as early voting kicked off.