Lest you think all Democrats have jumped on the socialism train, a reminder that so-called “progressives” are willing to attack even those on their side who dare to disagree with their big government agenda on one particular issue.

When Sen. Ben Nelson (D-Neb.) called the public plan a deal breaker, a progressive group co-founded by Joe Trippi launched a campaign in Nebraska accusing the senator of being a “sellout” for special interests.

After a strategy memo by the centrist Democratic think tank Third Way cautioned Democrats on overreaching on a public plan, Daily Kos bloggers went on the attack, and Third Way now faces a coordinated effort to pressure Third Way donors.

Sen. Mary Landrieu (D-La.) is the next target. On Tuesday, she said she opposed the public plan. By Wednesday, the liberal Health Care for America Now was drawing up a plan to change her mind.

I wonder exactly what Politico means by that. Recall that lefties were targeting donors to righty groups with fake legal threats and were publishing the personal information, resulting in the loss of jobs, of those in California who dare to stand up for traditional marriage. Typical thuggery tactics intended to shut down dissent through strong-arming.