But experts see a civic danger in the president frequently and falsely calling out what he labels treasonous behavior. Carlton F.W. Larson, a professor at the University of California at Davis School of Law and an expert on treason, said the president had cheapened the word through overuse. "It is a complete debasement of political discourse where ordinary political disagreements are elevated to a level of capital crime,” Mr. Larson said. “If Trump ever did uncover an instance of true treason, no one would believe him because he has so debased the meaning of that word.”