Trump was able to gather the hordes of weirdos in a way none of those other movements could. For whatever reason, he was an exceptionally powerful populist, and the other craven greed monsters want that power bad. It's been shown that that magic doesn't run off on them though and it seems to be flaking off trump very quickly these days.
There will always be another eventually, but it can't be denied that Trump's star is falling, and the Republicans have no one able to gather the hordes like trump could at the moment. If they lose their ass in November, it's very possible that it takes them quite a while to regroup in any real way. Their penchant for infighting will slow things down.
I've been firmly diagnosed with ADHD, once when I wasn't even being tested for it, but ADHD markers were high enough that they asked if I was seeking treatment for it. That being said, I can read books just fine. I've read tons, and not just fiction. I have several nonfiction books about scientific topics I'm into. I'm currently reading a book about British royalty just because I like David Mitchell's comedy.
I cannot imagine that I'm special. I'm certain that there are other ADHD power readers. It's a way to hyper focus after all. I know sitting to read is a common problem area, but not always.