The Trump administration has recently removed the chief scientist at the National Oceanic and Atmospheric Administration, the nation’s premier scientific agency, installed new political staff who have questioned accepted facts about climate change and imposed stricter controls on communications at the agency. The moves threaten to stifle a major source of objective United States government information about climate change that underpins federal rules on greenhouse gas emissions and offer an indication of the direction the agency will take if President Trump wins re-election. An early sign of the shift came last month, when Erik Noble, a former White House policy adviser who had just been appointed NOAA’s chief of staff, removed Craig McLean, the agency’s acting chief scientist. Mr. McLean had sent some of the new political appointees a message that asked them to acknowledge the agency’s scientific integrity policy […]