This comes from an article, "Bush's Choice of EPA Advisers Signals Tilt Toward Industry" - "An Investigative Report of the Center for Public Integrity", whoever they are:-----
"Bob Grady, a bureaucrat-turned-venture capitalist, started out working at the gubernatorial and congressional level, became the chief speechwriter and senior adviser for the 1988 Bush-Quayle campaign, and then served in that administration's Office of Management and Budget. He now counts himself among the heavy hitters at the Carlyle Group, where he is a partner and managing director in venture capital. (Carlyle is headed by former Defense Secretary Frank Carlucci, who has recruited several ex-Reagan and Bush staffers, including former Secretary of State James Baker and past budget chief Richard Darman. Billionaire financier George Soros and members of the Mellon family are also partners.) Grady also gave $9,000 to various federal campaigns in the past two years, $1,000 of that directly to Bush."
Looks like maybe some pretty influential folks appreciated Mueller's foot-dragging.