text:  Sean O'Brien is no stranger to politics or to political fights. His willingness to take on anyone standing in the way of workers was on display at a congressional hearing last year when he brawled with Republican Senator Mark Wayne Mullen. Well, stand your butt up then. You stand your butt up. Oh, hold on. Oh, stop it. Is that your solution? Last night, though, O'Brien took a totally different tone toward Republicans, making light of that fight and making clear his union support can still be won.