It’s 2016 all over again.

A crusading Bernie Sanders now faces off again against a more mainstream candidate, one with flaws that give many voters pause. This time, it’s Joe Biden.

Sure, Elizabeth Warren is still in the race for the Democratic nomination, but her chances of prevailing have evaporated. And, I must say here, I believe that part of the explanation for that boils down to sexism. I am baffled by her failure to attract more of a following. People will count errors by her campaign, but all candidates make errors. There is something more afoot in people’s relationship with Warren, something that they may not be willing to admit to themselves, something that they may not even be conscious of.

And, of course, there is Tulsi. That’s enough words on that suspect candidacy.

But with candidates withdrawing from the race and endorsing Biden, and with Biden’s surprisingly strong showing on Super Tuesday, it is clear that this is now a two-person race — two men, two elderly men, two elderly white men.

Democratic voters have decided that what an old white man — Donald Trump — broke, only an old white man — Sanders or Biden — can fix. That is a shocking outcome because the Democrats started with a historically diverse field of candidates.