Trump phenomenon in the U.S.

Answer the questions below to tie other readings in dialogue with Kagan's arguments:
In what ways does the Trump phenomenon in the U.S. either threaten American international decline from within, and/or challenge unrepresentative and ineffective U.S. government policies of an unaccountable elite? (Brooks, "Blame the Bobos;" McTague and Nicholas, "The World Order That Trump Revealed;" and related lecture and discussion.)