What happened behind the scenes that’s causing Trump to act so meek today?

lots of anti crazy meds 

Probably whatever not insane lawyer around him (i.e. NOT Giuliani) telling him his goose is cooked and that opening his )(&*% pie hole again would result in harsher still sentencing.

But the point is, at this time, he is probably as deep in as he could ever be.

A woman and officers were killed and his supporters were there.  He must feel somewhat responsible.  I do, because I am a Trump supporter.  I wasn't there but I probably would have known someone there as a peaceful protester.  74 million Americans feel cheated and that an election was stolen from us by the Democrats.  Even the Democrats know the election was lined with fraudulent ballots.  We sent President Trump to Washington to clean out the corruption, but we didn't know how deep it went and how many are involved in bribes and corruption.

The jig is up and the Big Lie dies.

A visit from the FBI. 

He probably got warned about the 25th amendment

He was the same trump today as he's been everyday.  Always pretending to try to do the right thing but never actually accomplishing it.

His most faithful boot lickers FINALLY got tired of his chit.

His lawyers probably told him that what he's doing is in violation of the Sedition Act and that none of them will come to his defense if he keeps going down this road.

 He wants his Twitter back.