ASSOCIATED PRESS In this July 28, 2010 photo, a pickup truck carries a large sign that reads " Vote Aug. 3 Yes Prop C  " outside a rally and fundraiser for supporters of a ballot measure to block the new federal health insurance law in St. Charles, Mo. Missouri will become the first state to the test the popularity of President Barack Obama's top policy accomplishment with a statewide ballot proposal attempting to reject its core mandate that most Americans have health insurance.

Photo by: Jeff Roberson

ASSOCIATED PRESS In this July 28, 2010 photo, a pickup truck carries a large sign that reads " Vote Aug. 3 Yes Prop C " outside a rally and fundraiser for supporters of a ballot measure to block the new federal health insurance law in St. Charles, Mo. Missouri will become the first state to the test the popularity of President Barack Obama's top policy accomplishment with a statewide ballot proposal attempting to reject its core mandate that most Americans have health insurance.