(AP) ATLANTA – The Justice Department has appealed a judge’s ruling that struck down the federal overhaul of the health care system, the Obama administration’s signature legislation.In its appeal, the Justice Department said the federal health care overhaul’s core requirement to make virtually all citizens buy health insurance or face tax penalties is constitutional because Congress has the authority to regulate interstate business.The government’s 62-page motion filed Friday to the 11th Circuit Court of Appeals argued that Congress had the power to enact the overhaul’s minimum coverage requirements because it is a “rational means of regulating the way participants in the health care market pay for their services.”The motion also warned that other pieces of the overhaul, including a law th…