He was having a nice back and forth with the guy and it did not seem contentious but usual banter (the guy was looking to say provocative things and probably is a glory whore) and when he said he is a millionaire working for billionaires is when Tucker lost his shit on him basically guaranteeing the interview would never air.
Tucker seemed offended. If you work for a news netowork controlled by a group with a specific political leaning, it will bias all of your coverage. Same with CNN and MSNBC. They all act like it is not true which is why they come across so disingenuous [sp?}