Right now, her strongest appeal to that field may simply be that she is not Donald Trump, given the tempest he has stirred up all this year with his intemperate campaign eruptions against women, Muslims, Mexicans and other foreigners, as well as his hostile views on American foreign policy assistance. As Ms. Clinton pointedly pivots her campaign to focus on Mr. Trump despite the fact that Mr. Sanders is still contending for the nomination, she risks an air of presumption that could alienate Sanders supporters she will need in general election. Mr. Trump in turn seems more than willing to take her on right now, as well as her surrogate husband over his presidential indiscretions and her own role, as Mr. Trump puts it, as his prime "enabler."