It's not just one issue, dude is a massive ******* traitor. You know he begged Barack Obama to come to Connecticut and campaign for him (AGAINST the Democratic nominee, Ned Lamont) in 2006 to get re-elected. Obama went and campaigned for Lieberman. Holy Joe then personally attacked Obama at both the RNC this year, and also on the stump and the news shows. Secondly, Lieberman hasn't been a Democrat since he was crushed in the Democratic Primary by Ned Lamont in 2006, the Democratic Caucus has no obligation to let him in, much less give him a prestigious Committee Chairmanship.
Thirdly, if Holy Joe really thinks putting an R next to his name will help his political future in Connecticut, then he can go to the Republican Caucus. My guess is that he's going to take Reid's Michael Corleone offer ("My offer is this: Nothing.") because he knows his political career is over if he doesn't accept.
Finally, Democrats are not kicking him out of the caucus. We are merely stripping him on his Homeland Security Committee Chairmanship, Lieberman says that this is "unacceptable" as if Mitch McConnell is going to let him chair anything. He has a ridiculous sense of entitlement. What sense does it make that Joe Lieberman, Democratic traitor, gets a major committee chairmanship when Hillary Clinton isn't the chair of any committee. Lieberman can suck my cock, and he's going to choke on Harry Reid's when he comes back on his knees accepting Reid's offer of Carlos ****.
What does Bush like to say: "Elections have consequences"? Elections have ******* consequences Lieberman.