When the White House announced the federal government would loan $465 million to Tesla, a California start-up company with plans to develop an all-electric sedan, President Obama called it an "historic opportunity to ensure that the next generation of fuel-efficient cars and trucks are made in America." The loan also represented a lucrative opportunity for Steve Westly, a major investor in the car company who had raised more than $500,000 for the president's campaign. In 2009, the U.S. Department of Energy lent more than half a billion dollars to companies backed by Westly's California venture capital firm. In 2010, the...