If I were running one of their campaigns, I would command the candidate to ignore Trumps tweets for two weeks. Don't read them, don't discuss them. Pick out two issues that you're going to focus on all the time, explain how what Trump has done is insufficient or wrong, and explain how we're going to make things better. Over and over. I would tell my candidate that if he/she says any of these words - racist, divisive, any word with "phobe" in it, reparations, injustice, privilege - and if he/she breaks it, find a new campaign manager. Stop dancing to the tune Trump plays for you.