How many votes can President Obama gain or Mitt Romney lose because of the Republican's opposition to renewing federal tax credits to wind energy producers? The answer, with apologies to Bob Dylan, is blowin' in the wind.
Obama hopes to influence the answer by relentlessly pounding the all-but-official Republican presidential nominee's opposition to the renewal.
PBS NewsHour continues their energy series with a visit to Colorado. Coal has been a traditional source of electrical energy in the state, but now a new energy source - natural gas - is making inroads.