“We invited him to come and just meet with us. He refuses to meet with Congress.”
This is a problem, why would he refuse to meet with Congress? Does he understand he is not all powerful? He has bosses, he has to do his job correctly or he gets the boot. It seems pretty clear he has allowed his personal politics to enter into his performance of his job.
He declared what Trump did as bad without even looking at it. The only thing this guy is willing to accept is if Trump sells off everything and loses 75% of his income, that and only that is acceptable to him, and it just is not going to happen.