So is this payback for Senator Ted Cruz’s stand on principle at the GOP convention in July?

Senate majority whip, Sen. John Cornyn is refusing to endorse Cruz in a 2018 reelection bid, should Cruz face Rep. Michael McCaul in a primary contest for the seat.

To be fair, however, Cornyn also refuses to endorse or back McCaul in his reelection bid.

“I’m not going to get involved in any primary races particularly with my colleagues in the Senate,” Cornyn said. “We’ll see what happens, but we’ve got plenty to worry about between now and November 2016 before we start worrying about November 2018.”

Instead, Cornyn said he would “sit on the sidelines and watch with interest.” McCaul has not confirmed whether he plans to officially challenge Cruz in two years. He told CNN earlier Wednesday, “I’m focusing on my reelection.”

So far, this seems like a lot of speculation, as Trump began the process of naming names to replace Cruz, due to a perceived slight at the convention.

It’s hard to say what impact Cruz’s stand had on his overall favorability with voters, or if it’s even something that will be remembered in two years.

For now, however, it appears Cruz will have to do his early campaigning without the help of party leaders.