President-elect Trump demanded an apology from the cast for making an unusual, politically charged appeal from the stage on Friday night to Vice President-elect Mike Pence, who was in the audience, urging him and Mr. Trump to “uphold our American values” and “work on behalf of all of us.” Mr. Trump, who has stirred bipartisan concern over his habit of attacking those who challenge him, said that the actors had “harassed” Mr. Pence and issued a battle cry to his supporters by saying that the musical’s cast had criticized “our wonderful future VP Mike Pence.”