Donald Trump’s promise to gut U.S. environmental regulations and revive the controversial Keystone XL oil pipeline if elected president is a nightmare for green groups, but it may be a dream come true for their fund-raisers. The country’s biggest environmental groups say the Republican White House hopeful’s pro-drilling and anti-global warming positions have sparked a record wave of donations and volunteer recruitment that could revitalize U.S. green advocacy. Trump has said he would revive the coal industry, pull the United States out of a global climate pact and expand oil drilling. “We couldn’t have asked for a more powerful motivator than Donald Trump,” Sierra Club Executive Director Michael […]