FILE - This March 25, 2014 file photo shows heat from machinery distorts the air as a worker watches over a hydraulic fracturing operation at an Encana Corp. gas well near Mead, Colo. The energy boom ... more 
FILE - This March 25, 2014 file photo shows heat from machinery distorts the air as a worker watches over a hydraulic fracturing operation at an Encana Corp. gas well near Mead, Colo. The energy boom is scrambling national politics. Democrats are split between environmentalists and business and labor groups. Some deeply-conservative areas are allying with conservationists against fracking, the technique largely responsible for the surge. (AP Photo/Brennan Linsley, File) less 
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Associated Press | Photo By Brennan Linsley, File
Sat, Apr 19, 2014 8:30 AM EDT