Newt Gingrich and Fox News Channel have mutually agreed to suspend the former House speaker’s contributor agreement with the network.

The decision comes as presumptive Republican presidential nominee Donald Trump is vetting Gingrich and others for the role of possible running mate.

“FOX News Channel has mutually agreed to suspend its contributor agreement with Former Speaker of the House Newt Gingrich effective immediately,” Jay Wallace, Fox News executive vice president for news, said in a statement. “Due to the intense media speculation about Gingrich’s potential selection as Donald Trump’s Vice Presidential candidate, we felt it best to halt his contributor role on the network to avoid all conflicts of interest that may arise.”

Trump has not yet announced his vice presidential pick.

His short-list is thought to include Gingrich, New Jersey Gov. Chris Christie, Indiana Gov. Mike Pence, and retired Lt. Gen. Mike Flynn, among others.

Gingrich recently confirmed to Fox News that he’s been vetted.