File photo of Ken Salazar and Barack Obama in Chicago

 
File photo of Ken Salazar and Barack Obama in Chicago
U.S. President-elect Barack Obama talks to reporters as Colorado Senator Ken Salazar, his nominee for secretary of interior, looks on during a news conference in Chicago, Illinois, in this December 17, 2008 file photo. Salazar is expected to announce he is stepping down, a White House official confirmed on Wednesday. REUTERS/Jeff Haynes/Files