EnergyWire: The Obama administration's approach to regulating methane could signal a tougher approach to the growing domestic oil and gas industry as President Obama tries to build his environmental legacy. Administration officials came down mostly on the side of environmental groups in the debate, hinting at an end to the kid-gloves approach they've taken with producers since before Obama's 2012 re-election. The White House disappointed environmentalists by leaving out -- for now -- existing oil and gas wells....