Comedian and actor Rosie O’Donnell has responded to President Donald Trump 's threat to have her U.S. citizenship revoked, the latest move in a yearslong back-and-forth between the two New York-born former TV stars.

The president on Saturday threatened to revoke comedian Rosie O'Donnell's U.S. citizenship, something he cannot legally do.

A federal judge in New Hampshire says he will certify a class action lawsuit including all children who will be affected by Trump’s executive order ending birthright citizenship.

"Birthright citizenship has protected us from those who might wish to pick and choose who gets to be American."

Removing O'Donnell's citizenship would be unconstitutional, as the 14th Amendment grants citizenship to all those born in the United States.