If he says they do, it means they don't. The opposite of whatever Trump says is more than likely the truth. A good rule of thumb.
Not really. There are too many ways to be wrong. If heo says the Sun rises in the South, assuming it rises in the North isn't going to help.
What he should be is ignored. It's tricky, because of how much power he and his cult have, but it would be for the best if we just shunned the GOP, actively defending ourselves from their legal shenanigans as best as possible under the law. All while being prepared mentally and logistically for what to do when they finally lose and launch likely-inevitable a campaign of unlawful tyranny and violence nationwide.