This guy is a nut. There’s no way Congress is going to arrest a cabinet member from the executive branch. The dems are bound and determined to cause a Constitutional crisis, they’re trying to burn the country down.
But according to what I have read, arresting no-show, uncooperative witnesses by the House Sergeant at Arms of the United States House of Representatives is allowed under law. And it has been done before.
But whether that will ever happen in this standoff between Nadler and Barr, is open for speculation.