Donald Trump’s chief economist said something interesting the other day. Yes, the remarks by Kevin Hassett, director of the National Economic Council, were stupid, but that goes without saying. The point is that they were stupid in an interesting way. On Fox News, Hassett was, as usual, boasting about how great the economy is, when he was asked why Americans aren’t feeling it — why the long-running Michigan index of consumer sentiment has hit its lowest level ever. He responded by claiming that the index “is being driven by Democrats who have Trump derangement syndrome.” Well, yes indeed … someone is deranged here. The Michigan survey tracks respondents by party, and politics clearly does affect economic perceptions. Democrats were much more positive about the economy under Biden than Republicans; they became much less positive, while Republicans became much more positive, when the White House changed hands: At this point, however, independents’ views of the economy are similar to those of Democrats.…