Clearly it has happened, and it has been accelerated and publicized by the Biden failings and the attempted Trump assassination. But it was already underway. If you need a single, unambiguous sign of it, I would cite MSNBC pulling off Morning Joe for a morning, for fear they would say something nasty about Trump.
Another way to put it is that Trump was a highly vulnerable, defeated President, facing numerous legal charges and indeed an actual felony conviction. Yet he now stands as a clear favorite in the next election. In conceptual terms, how exactly did that happen?
I had been thinking it would be a good cognitive test to ask people why they think the vibes have changed, and then to grade their answers for intelligence, insight, and intellectual honesty.
For instance, I used to read people arguing “Trump is popular because of racism,” but now that view is pretty clearly refuted, even if you think (as I do) that racism has some marginal impact on his support. Or other people have attributed the development to “polarization.” Whether or not you agree with the polarization thesis, it begs the question here, as we could be polarized with Trump as a big underdog.
In any case, thought I should start this process by offering my answers. Here they are, in a series of bullet points: