Trump administration officials are making plans to order grid operators to buy electricity from struggling coal and nuclear plants in an effort to extend their life, a move that could represent an unprecedented intervention into U.S. energy markets The Energy Department would exercise emergency authority under a pair of federal laws to direct the operators to purchase electricity or electric generation capacity from at-risk facilities, according to a memo obtained by Bloomberg News. The agency also is making plans to establish a ‘Strategic Electric Generation Reserve’ with the aim of promoting the national defense and maximizing domestic energy supplies.