What is the matter with Joe Lieberman?

Recent news stories concerning quotes from Sen. Joe Lieberman have really been strange. What is the matter with Lieberman? He seems to have abandoned any connection he once had with the Democratic Party so that he can serve his master, John McCain. Lieberman accompanied McCain on a tour to Iraq where he famously wore a helmet and bulletproof vest. Lieberman corrected McCain when he confused Sunnis and Shiites. Now Lieberman has been attacking Democratic presidential candidate, Sen. Barack Obama, with lies and innuendo. I think it is time to remove Lieberman from any leadership positions that he holds in the U.S. Senate. He has sold his soul to McCain and the Republican Party.