The actor, talk show host and comedian has publicly criticised US president on social media in the past week, but it's not the first time she's been vocal against him.

President Donald Trump’s recent threat that he was considering revoking Rosie O’Donnell’s citizenship says a lot about how the president intends to govern — and it’s “terrifying,” experts say.

Trump appears to view both free speech and U.S. citizenship as conditional, things he can revoke based on his own whims.