President Donald Trump is once again reviving his long-running feud with Rosie O’Donnell — this time with a baseless threat to revoke her citizenship. In a Saturday post on Truth Social, Trump referred to the actor and comedian as a “threat to humanity,” citing her as someone who is not in “the best interest” of the country.

O’Donnell drew attention last weekend after she posted a video to TikTok slamming the Trump administration’s response to the Texas floods, claiming the president “gut [ted] all of the early warning s...