He should have recused himself.
But he didn't, and he knew what the hell he was doing because he tried to get cameras in his courtroom but that ruling was shot down by the USSC.
He wanted cameras in there because he wanted this show trial to become a national spectacle, with himself playing the leading role. He wanted the whole country to see just what sort of wonton disregard he has for the rule of law, the will of the people and the U.S. Constitution.