"Will President Trump step up to lead US against bigotry?"
He won't; he's leading the bigots. He's embraced them unabashedly, and they've embraced him.
What will the bishops do? If they choose, individually or collectively, to speak, here's what I hope they don't do: I don't want them to denounce white supremacy, Nazism, the KKK, fascism, neo-fascism. Denouncing any of that, or all of that, is so easy as to be cowardly. The bishops must denounce Donald Trump, specifically, explicitly, and by name; and they must apologize for anything they said and did, collectively and individually, to promote his candidacy on the repulsive claim that a racist could be construed as "pro-life." Cardinal DiNardo, as President of the USCCB, has a particular obligation to repudiate the racist POTUS; even more: Archbishop Lori should resign his leadership role in the Conference. As the architect of the morally repugnant 'Fortnight for Freedom', no bishop has done more to promote Trump. Deplorable.