"When I give my word, I stick to it, and I'm definitely going to organize with the Senate Democratic caucus," Lieberman said.
If Democrats control the Senate, he would be in line to become chairman of the Homeland Security panel. (AP)
There is essentially no reason for him to switch. He'll get to be the chair of a powerful committee and have all manner of Democrat come begging for his forgiveness over the next few months. He's also going to be in a very powerful position as a potential swing vote. Switching parties wouldn't get him anything except enmity.
"Fresh off victory, Lieberman looks to the future." Associated Press 8 November, 2006.