The left's treatment of Joe Lieberman is a case study in liberal hypocrisy when it comes to "the big tent theory." The left keeps trying to tell the right that Republicans are in the minority because they're not inclusive enough. I've long argued that of the two ideolgies, it's the left that has a far greater purity test than the right. moveon.org is protesting at Lieberman's office because he dares to not tow the line on Obamacare? Remember he was their veep candidate in 2000.