With NBC’s Mark Murray reporting a new NBC/Wall Street Journal poll showing support for a government-run public-option insurance plan to be at its highest ever, it was heartening to learn today that Sen. Joe Lieberman, the McCain-supporting Democrat from Connecticut, has pledged to join a Republican filibuster to prevent a final yea-nay vote. This takes me back to Andy Samberg‘s legendary Rahm Emanuel riff on SNL in which he pledged to “strip Lieberman naked and make him walk his McCain-loving-ass back to Connecticut…you fucking turncoat!”

Leiberman won’t oppose efforts to get a health-care bill sent to the floor, but public option backers will of course need 60 votes to stop the filibuster, etc.