Trump's political career was over before the Capitol Hill event.
When the entire system opposes you, the people who are fickle are quick to abandon you when you are no longer in power.
The day of the Capitol Hill event, Trump made a speech that rambled on for 1.5 hours. That speech is one of the worst I have ever read, and yes, I read the entire thing. Four years of being POTUS, and he never understood the concept of being presidential. Had that speech been scripted, it would have last 15 minutes. Beyond that, he was losing the interest of the listeners, even the folks that stood by him.
His speech that day is the worst speech I have ever read. I was left with overwhelming sadness when I read it. He ranted about everyone and everything that betrayed him, not a speech of a strong man by any means. His advisors are not worth a good BM!!!