Organized labor spent tens of millions of dollars and untold man hours to help elect a Democratic Congress in 2006. So far the pay-off has been modest. But with the presidency at stake, unions are expected to spend up to $360 million by November, more than twice as much as four years ago. At the top of labor's agenda is the misnamed Employee Free Choice Act, which would deny employees the opportunity to vote before a union takes over their workplace. Today organized labor represents just 12 percent of all workers and 7.5 percent of private employees. Labor officials blame...