Obama’s grass roots organization is starting to really feel the heat on health care reform:

On Wednesday morning, Organizing for America, as Obama’s reconstituted campaign organization is now known, e-mailed its list of 13 million Obama supporters asking them to “call your senators now and help us ‘ring in reform.’”

The campaign yielded 150,000 calls — less than half the number of a similar effort in October — and it prompted a backlash among online and local activists who had logged countless volunteer supporting Obama’s campaign and legislative agenda, but who felt betrayed by recent Democratic concessions in the health-care reform fight.

[SNIP]

But there’s plenty of unhappiness. One leading OFA volunteer in Florida blasted an e-mail to a statewide listserv urging activists to “just say no” to the phone-banking effort — uncorking a torrent of frustration from Florida Democrats — while some OFA subscribers replied directly to the call-to-action e-mail with angry messages and others asked to be removed from the list entirely.

Still others said they would indeed call their senators — but would urge them to oppose the bill. And the liberal blogosphere registered its dissatisfaction with the call to action, with one prominent blogger on MyDD predicting that “Organizing for America will get a rude awakening when they try to round up canvassers and phone bankers.”

This isn’t Republicans or some angry bloggers hiding in their parents basement – this is Obama’s core supporters. People are pissed off that we sat here and watched everything we hoped for get pissed away without any fight from the man we supported.