WASHINGTON — Jermaine Anderson keeps going back to the same memory of Donald Trump, then a candidate for president of the United States, referring to some Mexican immigrants as rapists and murderers. "You can't be saying that (if) you're the president," says Anderson, a 21-year-old student from Coconut Creek, Florida. That Trump is undeniably the nation's 45th president doesn't sit easily with young Americans like Anderson who are the nation's increasingly diverse electorate of the future, according to a new poll. A majority of young adults — 57 percent — see Trump's presidency as illegitimate, including about three-quarters of blacks...