Lieberman's constant presence at McCain's side fuels speculation that he would join a McCain administration. Yet he already has talked with Senate Majority Leader Harry Reid about his future in the caucus.
Would Lieberman, 66, a four-term Connecticut senator, be stripped of his committee chairmanship and seniority if Democrats no longer had to rely on a self-described "Independent Democrat" for their one-vote majority?
"I can tell you Sen. Reid had talked to me a few times and said he knows there will be talk if we get more than 51 Democrats next year," Lieberman said. "As far as he is concerned, I will retain my seniority, etc., no matter how many Democrats there are next year."
Reid's spokesman, Jim Manley, confirmed Lieberman's account.