Final approval of hundreds of interstate pipelines, transmission lines and liquefied-natural-gas projects will be delayed for months because the Trump administration has changed leadership at the Federal Energy Regulatory Commission. That move leaves FERC one short of the three-member quorum needed to vote on energy projects.

President Donald Trump on Jan. 26 elevated FERC Commissioner Cheryl LaFleur, a Democrat and former electricity industry executive, to acting chairman. The same day, Chairman Norman Bay announced that he would step down from the commission on Feb. 3.