Cry me a river. General Motors' CEO is complaining that the Chevy Volt has become a "political punching bag." As the Detroit Free Press reports , GM CEO Dan Akerson defended the Volt before a House of Representatives subcommittee Wednesday, saying that the hybrid electric vehicle seemed to be under attack as much for political as practical reasons. 'We did not design the Volt to become a political punching bag, and that’s what it’s become,' Akerson said. The optics of Akerson, CEO of a company whose very existence today stems completely from an infusion of tens of billions of...