Shut down his twitter account for hate speech. He expressed hate against a sitting president including threats of assassination (my judgment of the meaning) calling it “insurance.” OTHERS say it means hurtful Mueller stuff. How do you all know that?
Sorry, JFK died with the same kind of threat and they said it might have to “get wet” meaning blood from bullets to kill him. “They” were the CIA and FBI in 1963.
My guess is that it wasn’t anything as grandiose as an outright assassination. Give Trump’s highly reactive nature, he thought they’d take Trump down with politics. They underestimated the toughness of his political hide, which is made out of something like tessellated diamond.