HT Brian Faughnan at WorldWideStandard.com who wrote,
It's hard to imagine that Joe Lieberman would have endorsed a Republican for president if he remained a Democrat in good standing in the U.S. Senate. Lieberman points out that one reason he endorsed McCain rather than a Democrat is that no Democrat asked for his endorsement. If Lieberman had been re-elected to the Senate as the Democratic nominee (rather than as an Independent), one of his colleagues might have sought his endorsement.
If McCain finishes strong in New Hampshire, he might have to send a thank you card to MoveOn.