After 34 House Democrats voted against the health care bill in March, liberal groups and their allies in the labor movement vowed to exact revenge.

The threats ranged from crippling primary election challenges to a withdrawal of support for some of the offending lawmakers. In a few cases, activists even went so far as to say they would run third-party candidates against the Democrats in November.

But five months later, the group of 34 has emerged from primary season not much worse for the wear. Every one of the 30 lawmakers who voted against the health care bill and is seeking another term won re-nomination.

The last of the group to be tested, Massachusetts Rep. Stephen Lynch, won his primary Tuesday, dispatching former Service Employees International Union Regional Political Director Mac D'Alessandro.

"The last man standing — the last primary challenger to a Democrat who voted against the health care bill," is how D'Alessandro labeled himself in a recent post on the liberal Daily Kos website.