Felix Kramer is on a mission, one that carried him and his new plug-in Toyota Prius hybrid to the steps of Capitol Hill. There he and representatives of Electro Energy, which brought along their own plug-in Prius, showcased to some of Washington's most powerful politicians, from Orrin Hatch to Hilary Clinton, technology that can help make America less dependent on petroleum: cars that can get 100 mpg. The event -- organized by SetAmericaFree.Org -- was planned to coincide with an announced summit between the White House and Detroit's beleaguered carmakers. Although the meeting was postponed at the last minute by...