In early March, Environmental Protection Agency Administrator Scott Pruitt approached the White House with a request: He wanted substantial pay raises for two of his closest aides.The aides, Sarah Greenwalt and Millan Hupp, were part of the small group of staffers who had traveled with Pruitt to Washington from Oklahoma, where he had served as attorney general. Greenwalt, a 30-year-old who had worked as Pruitt’s general counsel in Oklahoma, was now his senior counsel at the EPA. Hupp, 26, was working on his political team before she moved to D.C. to become the agency’s scheduling director.Pruitt asked that Greenwalt’s salary be raised from $107,435 to $164,200; Hupp’s, from $86,460 to $114,590. Because both women were political appointees, he needed the White House to sign-off on their new pay. According to a source with direct knowledge of the meeting, held in the Eisenhower Executive Office Building, staffers from the Presidential Personnel Office dismissed Pruitt’s application. The White House, the source said, declined to approve the raises.