Brian Beutler caught up with Joe Lieberman outside his office a few minutes ago as Lieberman was headed to the Democratic caucus meeting, and Lieberman explained that the reason he’s opposed to a Medicare buy-in, after favoring it only three months ago, is that the Baucus bill already addressed the problems of the uninsured in the 55-65 age bracket: a buy-in would be redundant.
That’s not exactly true, but regardless, it doesn’t explain why Lieberman would be willing to torpedo the entire health care reform bill with a filibuster over a mere redundancy.