WASHINGTON (AP) — A federal appeals court has delivered a serious setback to President Barack Obama's health care law, potentially derailing subsidies for many low- and middle-income people who have bought policies. If upheld, the decision could mean premium increases for more than half of the 8 million Americans who purchased taxpayer-subsidized insurance under the law. It affects consumers who purchased their coverage through the federal insurance marketplace — or exchange— that serves 36 states. A three-judge panel in Washington ruled 2-1 that the law, as written, only allows insurance subsidies in states that have set up their own exchanges.Read more on NewsOK.com