Defund Obamacare supporters turning up volume

Conservatives backing the push to shut down the federal government if funding isn't cut off by the end of September for President Barack Obama's health care law are launching new ads and a series of town halls starting this week.

The new drive comes as a growing number of Republicans are resisting such calls for a government shutdown over the Affordable Care Act, better known as Obamacare.

Heritage Action for America, a leading political advocacy group, Monday announced it would spend more than half a million dollars to run on-line...