Joe Lieberman will be announcing his retirement from the senate later today. Upon his retirement he will have served 24 years. He also made a bid for the presidency and was on the ticket for vice president with Al Gore in 2000.
Lieberman has raised the ire of the left on many occasions, especially when he backed his good friend John McCain for president over Obama and his support for the war on terror. While I have little that I agree with Lieberman on, he is an honest man who stands by his convictions.
I don't think this makes much of difference for the dems when it comes to trying to keep hold of the senate next year, as CT is a reliably blue state.