Lieberman is an independent who is among a group of about a dozen moderate senators whose support Reid will need as the critical Senate vote nears.
A report at the link below says:
Sen. Joe Lieberman says he will back a GOP filibuster of Senate Majority Leader Harry Reid’s healthcare reform bill because of its inclusion of a “public option” -- a devastating blow to the Obama administration’s hopes of unified Democratic support for a healthcare bill with a government-run insurance program.
Lieberman opposes any healthcare bill that includes the public option.
This is no surprise because Lieberman is from Connecticut -- home to healthcare insurance companies. The public option would eventually be the death knell of the private healthcare industry.
Link