The current budget brinkmanship is just the latest development in a well-financed, broad-based assault on the health law, Mr. Obama’s signature legislative initiative. Groups like Tea Party Patriots, Americans for Prosperity and FreedomWorks are all immersed in the fight, as is Club for Growth, a business-backed nonprofit organization. Some, like Generation Opportunity and Young Americans for Liberty, both aimed at young adults, are upstarts. Heritage Action is new, too, founded in 2010 to advance the policy prescriptions of its sister group, the Heritage Foundation.
The billionaire Koch brothers, Charles and David, have been deeply involved with financing the overall effort. A group linked to the Kochs, Freedom Partners Chamber of Commerce, disbursed more than $200 million last year to nonprofit organizations involved in the fight. Included was $5 million to Generation Opportunity, which created a buzz last month with an Internet advertisement showing a menacing Uncle Sam figure popping up between a woman’s legs during a gynecological exam.
The groups have also sought to pressure vulnerable Republican members of Congress with scorecards keeping track of their health care votes; have burned faux “Obamacare cards” on college campuses; and have distributed scripts for phone calls to Congressional offices, sample letters to editors and Twitter and Facebook offerings for followers to present as their own.
One sample Twitter offering — “Obamacare is a train wreck” — is a common refrain for Speaker John A. Boehner.
As the defunding movement picked up steam among outside advocates, Republicans who sounded tepid became targets. The Senate Conservatives Fund, a political action committee dedicated to “electing true conservatives,” ran radio advertisements against three Republican incumbents.
Heritage Action ran critical Internet advertisements in the districts of 100 Republican lawmakers who had failed to sign a letter by a North Carolina freshman, Representative Mark Meadows, urging Mr. Boehner to take up the defunding cause.
“They’ve been hugely influential,” said David Wasserman, who tracks House races for the nonpartisan Cook Political Report. “When else in our history has a freshman member of Congress from North Carolina been able to round up a gang of 80 that’s essentially ground the government to a halt?”
On Capitol Hill, the advocates found willing partners in Tea Party conservatives, who have repeatedly threatened to shut down the government if they do not get their way on spending issues. This time they said they were so alarmed by the health law that they were willing to risk a shutdown over it. (“This is exactly what the public wants,” Representative Michele Bachmann of Minnesota, founder of the House Tea Party Caucus, said on the eve of the shutdown.) ... [End of Excerpt]