Nope he was too conservative for Dems...they booted him
Lieberman failed the litmus test on only two issues, being pro-war in Iraq and pro Israel. He is a solid liberal in every other issue there is. As one Freeper here once noted (perhaps quoting someone else) Joe often very publicly wrestles with his conscience; I just wish he'd let his conscience win every once in a while
He’s way to the left of center, stands for the same principles as the Dems on matters such as abortion (100% NARAL rating) and caucuses with the Dems so there really isn’t a dime’s worth of difference.