I think Jones’ victory in Alabama will prove to be as described in the subject in this post. Presidents are term-limited, so even if he weren’t historically unpopular, Trump’s days would be numbered compared to Representatives and Senators (who can serve for decades).
The Jones victory shows that Trumpism is having increasing difficulty attracting popular support. Republicans who want to serve the long careers in Congress they envisioned are now on notice that their own self-interest may well be better served by taking a political stance that’s independent of the White House.
At the very least, the influence of fascists like Steve Bannon over the the Republicans just suffered a big setback tonight.