WASHINGTON: John McCain, the presumptive Republican presidential nominee, is fending off charges that he pushed the U.S. Air Force into a faulty $35 billion deal for midair refueling planes. Democrats weighed in after the Government Accountability Office, a nonpartisan arm of Congress, found last week that the air force had made "significant errors that could have affected the outcome of what was a close competition" between Boeing and a combination of Northrop Grumman and European Aerospace & Defense Systems, or EADS, which was awarded the contract. The Democratic National Committee accused McCain of "mimicking" EADS, the corporate parent of Airbus,...