Secretary of the Interior
In the job: Ken Salazar
Salazar announced on January 16 that he would leave his post by the end of March and return to his home in Colorado.
A former U.S. senator, Salazar led the administration's management of the Deepwater Horizon explosion and the BP oil disaster in the Gulf of Mexico in 2010. Before being elected to the Senate, Salazar was Colorado's attorney general.
Contender: David Hayes
The top spot at the Interior Department could go to Deputy Interior Secretary David Hayes. In his current position, Hayes co-chairs the secretary's Energy and Climate Change Task Force. Hayes also headed the Interior Department's response to the Deepwater Horizon oil spill by managing day-to-day operational issues. Hayes was deputy secretary and counselor to the interior secretary in the Clinton administration and was chairman of the board of the Environmental Law Institute.
Other reported replacements include former Sen. Byron Dorgan of North Dakota and former Wyoming Gov. Dave Freudenthal. Washington Gov. Chris Gregoire also finds her name on the shortlist.