Donald Trump has threatened to revoke Rosie O'Donnell's U.S. citizenship after her move to Ireland, with the star clapping back in the latest development in their feud, which dates back to her days on 'The View.

“Because of the fact that Rosie O’Donnell is not in the best interests of our Great Country, I am giving serious consideration to taking away her Citizenship,” Trump wrote. “She is a Threat to Humanity, and should remain in the wonderful Country of Ireland, if they want her. GOD BLESS AMERICA!”

President Donald Trump unleashed on Rosie O'Donnell, his longtime foe and former co-host of "The View," threatening to revoke her U.S. citizenship.