For more than a decade, Sen. James M. Inhofe has raged against the scientific consensus that humans are fueling climate change, calling it “the greatest hoax” ever perpetrated on Americans. The Oklahoma Republican has blasted the Environmental Protection Agency as an “activist organization” that has unfairly burdened everyone from farmers to fossil-fuel companies. Now the man critics once dismissed as a political outlier has an unprecedented opportunity to shape the nation’s energy and environmental policies. And he has helped populate the upper ranks of the agency he has derided with several of his closest confidants. At least half a dozen former aides to Inhofe — and counting — have been hired into top positions at the EPA and the White House. The chief of staff and deputy chief of staff to EPA Administrator Scott Pruitt, a fellow Oklahoman and longtime friend of Inhofe, spent years working for the senator. […]