This post was originally published on Politico.

With just days until Texas’ primary, Republicans in Washington are growing more alarmed that their increasingly vicious intraparty contest could cost them a must-win Senate seat.

Sen. John Cornyn appears to be headed to an expensive and nasty 10-week runoff against Texas Attorney General Ken Paxton, with a strong chance that Paxton wins the nomination even after national Republicans spent months airing his dirty laundry all over the Texas airwaves in an effort to boost Cornyn. 

“Honestly, if you look at the polling in a general election setting, I don’t think it’s outside the realm of possibility that the seat

Author: By Liz Crampton, Jordain Carney, Samuel Benson, Alex Gangitano and Adam Wren