President Trump pushed forward in a feud with his replacement on “Celebrity Apprentice,” tweeting that Arnold Schwarzenegger is doing “even worse” as a reality TV host than he did as California’s governor.

Yes, Arnold Schwarzenegger did a really bad job as Governor of California and even worse on the Apprentice…but at least he tried hard!

— Donald J. Trump (@realDonaldTrump) February 3, 2017

Trump opened the National Prayer Breakfast on Thursday with a comment about how his successor on the reality television show had tanked its ratings, while also boasting about his own “tremendous success” as host of “The Apprentice” and “Celebrity Apprentice.”

{mosads}”We know how that turned out. The ratings went right down the tubes. It’s been a total disaster,” Trump said of Schwarzenegger’s tenure as host.

“And I want to just pray for Arnold if we can, for those ratings,” he said.

Schwarzenegger promptly responded to Trump’s comments, posting a video on Twitter in which he offered to step into the presidency if Trump wanted to return to his role in the TV show.

The movie star and former Republican governor refused to endorse Trump, even after he had won the GOP presidential nomination.