For me, at least, his filibuster of the unemployment extension was the last straw. Everyone's least favorite "republican in cheap clothing" needs to be thrown out of the Democratic Caucus.
OK, he's not my Senator, so I have less to say about him than a Nebraske voter, but his "tail wagging the dog" bits of nastieness, and rethug stupidity need to end. He deserves to be cast out, walk the plank, begone foul demon! It will effectively, cost the Democrats nothing, because he's been consistently a republican in his voting, so what the heck, throw the stinker out! OUT!!!!!! Tell him he will get no further support from the party, no seniority, no good committee assignments, nothing but curses from here till his next election attempt as an independent. Have every decent member of the caucus shun him. Tell him he's a useless, greedy, selfish prick to his face. Step on his toes, frequently and intentionally. Get rid of the rotten SOB!