The GOP wants to avoid a government shutdown on Oct. 1 by passing a temporary government funding bill that would not include any money for Mr. Obama's health-care reform law. Here is a comprehensive primer on how we got here and who's involved.
Healthcare.gov: The tea party had been dropping in recent opinion polls. But the political eruption over the Affordable Care Act has given tea partiers another reason to go after Democrats, and perhaps some Republicans as well.
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