The Secret to Donald Trump's Power

This article and the graph above explain the source of Trump's power very well.  It is generally assumed that Congressional Republicans do not dare defy Trump for two reasons.  One is the threat of a primary challenges, now financed by Elon Musk.  The other is the threat of actual physical violence by Trump supporters.  Both threats will diminish if Trump loses popularity.

And he has lost popularity, at least to some extent.  It has not been as rapid or as dramatic as our side would like to think.  The honeymoon, never very strong to begin with, is now over.  His popularity has declined and will presumably decline more.  

But the decline is primarily among independents.  Democrats hated the man's guts from the start and still do.  And, as beginning of the graph above shows, there has even been some decline among Republican -- from a net approval of 90% to a net approval of 85%.

As long as Trump remains that popular among Republicans, he is invincible among Republicans in Congress.