Nate Cohn cautions us not to make too much of the polls supposedly showing the Trump surge continuing, as many — but not all – were taken before the McCain affair. Fair point. But there’s enough genuine post-McCain polling to show that Trump hasn’t imploded, the way virtually every pundit predicted he would.

I’m actually mad at myself here: I had meant to put up a post questioning that conventional wisdom, but never got around to it, and now you only have my word that what I’m about to say isn’t just hindsight, but a prediction. Oh well. Anyway, on to the point.

What I would argue is key to this situation — and, in particular, key to understanding how the conventional wisdom on Trump/McCain went so wrong — is the reality that a lot of people are, in effect, members of a delusional cult that is impervious to logic and evidence, and has lost touch with reality.

I am, of course, talking about pundits who prize themselves for their centrism.

Pundit centrism in modern America is a strange thing. It’s not about policy, as you can see from the many occasions when members of the cult have demanded that Barack Obama change his ways and advocate things that … he was already advocating. What defines the cult is, instead, the insistence that the parties are symmetric, that they are equally extreme, and that the responsible, virtuous position is always somewhere in between.

The trouble is that this isn’t remotely true. Democrats constitute a normal political party, with some spread between its left and right wings, but in general espousing moderate positions. The GOP, on the other hand, is a deeply radical faction; even its supposed moderates are moderate only in tone, not in policy positions, and its base is motivated by anger against Others.

What this means, in turn, is that to sustain their self-image centrists must misrepresent reality.

On one side, they can’t admit the moderation of the Democrats, which is why you had the spectacle of demands that Obama change course and support his own policies.

On the other side, they have had to invent an imaginary GOP that bears little resemblance to the real thing. This means being continually surprised by the radicalism of the base. It also means a determination to see various Republicans as Serious, Honest Conservatives — SHCs? — whom the centrists know, just know, have to exist.

We saw this a lot in the cult of Paul Ryan, who was and is very obviously a con man, whose numbers have never added up, but who was nonetheless treated with vast respect — and still sometimes is.

But the ur-SHC is John McCain, the Straight-Talking Maverick. Never mind that he is clearly eager to wage as many wars as possible, that he has long since abandoned his once-realistic positions on climate change and immigration, that he tried to put Sarah Palin a heartbeat from the presidency. McCain the myth is who they see, and keep putting on TV. And they imagined that everyone else must see him the same way, that Trump’s sneering at his war record would cause everyone to turn away in disgust.

But the Republican base isn’t eager to hear from SHCs; it has never put McCain on a pedestal; and people who like Donald Trump are not exactly likely to be scared off by his lack of decorum.

For what it’s worth, I still don’t expect The Donald to win the nomination; the big money will presumably coalesce around someone — though given Jeb’s foot-in-mouth performance it’s hard to see who — and will probably squeeze him out in the end. But the story so far has been a remarkable illustration of how little many professional political pundits seem to understand.