Donald Trump can’t fire the man protesting his relationship with Macy’s, but the Apprenticestar might have sights on suing him.

Trump attorney Alan Gartenhas sent a cease and desist letter to Angelo Carusone, organizer of the online campaign Dump Trump, and threatened to seek damages of “not less than” $25 million if the protest continues, The Hollywood Reporter has learned exclusively. Carusone tells THR he plans to continue the protest and called the threat of legal action "bullying" on Trump's part.