https://www.newsweek.com/donald-trump-ken-paxton-john-cornyn-democrats-james-talarico-11994199
President Donald Trump got another endorsement win under his belt when Texas Attorney General Ken Paxton defeated incumbent Senator John Cornyn in the state's U.S. Senate primary on Tuesday, but it could deliver a defeat Republicans haven’t seen in over 30 years.
Trump wants allies in the Senate, and he’s used his platform and power to persuade voters to kick Cornyn out of office for being “very disloyal.” But Cornyn voted with Trump over 99 percent of the time, according to his campaign, and now, Trump risks losing a Republican in the Senate—however disappointed he may be with them—because an open seat is much easier for Democrats to flip than ousting an incumbent.
But Republicans are nervous about the upcoming election.
"I think the chances of the Democrats winning in Texas are better now than they've been in 25 years," Republican strategist Mike Madrid previously told Newsweek. "You have to have a favorable political environment for the Democrats. You have to have a remarkable Democratic candidate with crossover appeal, and they have that. And the third is you have to have a remarkably damaged Republican candidate, and they have that."