Environmentalists, labor unions and other pro-regulation advocates are suing over President Donald Trump's executive order (EO) that requires agencies to balance each new rule they issue by identifying two existing rules for repeal, saying the mandate violates Clean Air Act requirements for the Environmental Protection Act to issue air and climate regulations. The Natural Resources Defense Council, the Communications Workers of America and Public Citizen filed a joint complaint Feb. 8 in the U.S. District Court for the District of...