From CNN: Chief of Staff Bill Daley will be replaced by Office of Management and Budget Director Jack Lew.
Lew will remain in place for now to finish the 2013 budget proposal, which is due in early February, said Kenneth Baer, the Office of Management and Budget communications director.
"Whatever decision the president makes about who is to lead the agency (after Lew departs), there will be a continuity of leadership at the highest levels," Baer said of the OMB.
Lew became OMB director in November 2010, succeeding Peter Orszag. Lew also held the post in the Clinton administration and later served as deputy secretary of state for management and resources in the Obama administration.