Treasury Secretary Janet L. Yellen tours the Ford Rouge Electric Vehicle Center before speaking about the Biden Administration’s economic agenda in Dearborn, Mich., Sept. 8, 2022. President Joe Biden, a self-described “car guy,″ often promises to lead by example by moving swiftly to convert the sprawling federal fleet to zero-emission electric vehicles. But efforts to help meet his ambitious climate goals by eliminating gas-powered vehicles from the federal fleet have lagged. (AP Photo/Paul Sancya, File)