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The sleeper issue of the 2016 Democratic primary

Fracking is quickly emerging as an under-the-radar issue likely to shake up the Democratic presidential primary in 2016.

Pump jacks and wells are seen in an oil field on the Monterey Shale formation where gas and oil extraction using hydraulic fracturing, or fracking, is on the verge of a boom on March 23, 2014 near McKittrick, Calif. (Photo by David McNew/Getty)
Pump jacks and wells are seen in an oil field on the Monterey Shale formation where gas and oil extraction using hydraulic fracturing, or fracking, is on the verge of a boom on March 23, 2014 near McKittrick, Calif.Getty Images

Alex Seitz-Wald