Wall Street and Kochs Fuel Most Expensive U.S. Senate Race Ever

  • $139 million already spent in Pennsylvania Senate contest
  • Koch-backed groups have spent almost $10 million for Toomey
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The most expensive U.S. Senate race in history is unfolding in Pennsylvania, where Wall Street, unions and billionaire industrialists Charles and David Koch are flooding the state with money.

At least $139 million has been spent by advocacy groups and the candidates, Republican incumbent Pat Toomey and Democrat Katie McGinty, Federal Election Commission filings show. The money has paid for legions of door-to-door canvassers and about 449 hours of negative television ads over the past six months.