WASHINGTON (AP) – Former House Speaker John Boehner is unloading on Texas Sen. Ted Cruz, calling him “Lucifer in the flesh.”

“I get along with almost everyone, but I have never worked with a more miserable son of a bitch in my life,” Boehner tells students at Stanford University according to The Stanford Daily.

The Ohio Republican resigned last fall under pressure from conservatives allied with Cruz. Boehner’s well-known contempt for the Texan stems in part from Cruz’s role forcing a partial government shutdown in 2013. Boehner said he and Donald Trump are “texting buddies” and he would vote for Trump, but not Cruz.

Of Ohio Gov. John Kasich Boehner said he “requires more effort on my behalf than all my other friends . but he’s still my friend, and I love him.”