Arizona Gov. Jan Brewer has decided against creating a state-run health insurance exchange to implement a key part of President Obama's federal healthcare law. Brewer's decision means the federal government will set up an online marketplace for the state, offering subsidized private health coverage to the middle class. The governor reiterated her unwavering opposition to the healthcare overhaul, and said there were too many costs and questions associated with a state-run exchange. She sent a federal official a one-page letter conveying her decision.