THERE WAS a time, not long ago, when an important skill for journalists was translating the code in which powerful people spoke about each other. Carefully prepared speeches and other public remarks would be dissected for hints about the arguments happening in private. Among Donald Trump’s many achievements is upending this system. In his administration people seem to say exactly what they think at any given moment. Wild threats are made—to end habeas corpus; to take Greenland by force—without any follow-through. Journalists must now try to guess what is real and what is for show.