Republicans should act swiftly to withdraw their support of Donald Trump and find a replacement for the top of their presidential ticket, MSNBC’s Joe Scarborough argued in an op-ed on Wednesday.

“A bloody line has been crossed that cannot be ignored,” the former Republican congressman wrote in the Washington Post. “At long last, Donald Trump has left the Republican Party few options but to act decisively and get this political train wreck off the tracks before something terrible happens.”