Four people have tried to kill President Trump in less than two years, an unprecedented record that some blame on the left wing’s virulent demonization of the president, otherwise known as Trump Derangement Syndrome. Soon after the Secret Service took down the gunman who attempted to storm the Washington Hilton ballroom where Mr. Trump and top members of his administration were seated, the president was ready to go back to his table and resume the White House Correspondents’ Dinner as though