Nominations of James S. Simpson, Robert M. Couch, Christopher A. Padilla, and Bijan Rafiekian : hearing before the Committee on Banking, Housing, and Urban Affairs, United States Senate, One Hundred Ninth Congress, second session, on nominations of James S. Simpson, of New York, to be Federal Transit Administrator, U.S. Department of Transportation; Robert M. Couch, of Alabama, to be President, Government National Mortgage Association (Ginnie Mae); Christopher A. Padilla, of the District of Columbia, to be Assistant Secretary, U.S. Department of Commerce; Bijan Rafiekian, of California, to be a member of the Board of Directors, Export-Import Bank of the United States, March 14 and September 27, 2006.