The U.S. Justice Department asked a federal appeals court on Friday to reconsider its July 22 ruling that poses a major setback to the Obamacare health insurance overhaul as it could limit the availability of federal health insurance subsidies for millions of people. In the ruling last month, the appeals court said the subsidies, which help people afford health insurance, may only be paid in states that have their own online health insurance exchanges. There are 36 states that lack their own exchanges, which are a central feature in the Obamacare system. Five million people could be affected, analysts have estimated, if subsidies were to disappear from the federally created marketplaces that have been set up in the states that did not set up their own exchanges. In the court filing, the government, as expected, asked the full U.S. Court of Appeals for the District of Columbia Circuit to review the three-judge panel's decision. If the court agrees to rehear the case, oral a