What if pretty much all of them were HermanCainHermanCainHermanCain? -- repost

Not Biden or Sanders. Arguably not Warren. But possibly everyone else in the Democratic field who got the commentators hot and bothered could be explained by the dynamics described below, It is the nature of the game to have small feedback driven surges that quickly fade.That's one of the reasons campaign data is so noisy. Another reason is the political journalists who insist on amplifying that noise.

What if Mayor Pete is HermanCainHermanCainHermanCain?

I've been meaning to write this up for quite a while, but it keeps getting put off and I'm afraid if I don't get something quick off, events may overtake us again. I'll try to come back to this if we get a chance. 

Those who followed our comments on the 2016 may remember how various pundits (especially Nate Cohn) truly, deeply, desperately wanted to convince us and, more to the point themselves, that Donald Trump was just another Herman Cain and his polls numbers would fall just as quickly.

The analogy never made any sense with Trump, but the idea of an HC3, someone who emerges from the middle of the pack for little apparent reason, seems to be on the verge of challenging the leading candidates only to have that surge evaporate, can be useful.

My take on HC3s is that it's basically a mix of symmetry breaking and a Keynesian beauty contest. Voters are dissatisfied or, at least, with the front runners. As the decision point approaches, second and third tier choices are reexamined.with the considerably lower standard of being an acceptable alternative. Eventually this process converges on a candidate, at which point the scrutiny increases and the bloom is off the rose.

I'm not saying that Pete Buttigieg is a Herman Cain (I'm not even saying Herman Cain was a Herman Cain), but so far, I don't know that I've heard any supporter describe Buttigieg in positive rather than non-negative terms, and that is generally not a good sign.