Now, their long-standing feud has escalated after Trump threatened to revoke the comedian's U.S. citizenship months after she fled to Ireland.

President Donald Trump says he is considering “taking away” the U.S. citizenship of a longtime rival, actress and comedian Rosie O’Donnell, despite a decades-old Supreme Court ruling that expressly p...

“Listen, this guy annoys me on a multitude of levels,” Rosie O'Donnell said of the reality star.