Article continues below advertisementDonald Trump doubled down in a Truth Social post on his threat to revoke Rosie O'Donnell's U.S. citizenship amid their years-long feud."As previously mentioned, we are giving serious thought to taking away Rosie O'Donnell's Citizenship," the president wrote on Wednesday, September 3. "She is not a Great American and is, in my opinion, incapable of being so!"Article continues below advertisementDonald Trump and Rosie O'Donnell's Feud Heats UpSource: @realdonaldtrump/Truth SocialThe president claimed the comedian is 'incapable' of being a 'great American.