Joltin' Joe, it may be time for you to go. You've moved from Republican Lite to Bushite.

In recent weeks, [Joe Lieberman] has angered Democratic activists nationwide for expressing a willingness to work with President Bush to change Social Security. Critics say that is just his latest act of disloyalty to the party. He already had supported the war in Iraq and Mr. Bush's cabinet choices - and received a televised presidential smooch at the State of the Union address.

...Their disappointment with Mr. Lieberman illustrates the difficulty of trying to be a centrist in an increasingly polarized political climate. Mr. Lieberman has gone from a possible Democratic heir apparent to a presidential primary footnote in 2004 to the conspicuous odd man out in his own Senate party caucus.

The Times reports Lieberman is laughing off the criticism. He still has the support of his constitutency. If I had to make an educated guess, I say that the attacks on Lieberman are about to begin. He will see a drop in his support. He will see a challenger. He will get jolted out of his complacency -- and his notion that he can vote his own beliefs over those of his constituents and the Democratic Party. This is not about right or left. Social Security is about the core values of the Democratic party, values Joe Lieberman has abandoned.