There goes another chief of staff. Bill Daley, who has directed Barack Obama's White House since January 2011, handed in his resignation last week, senior administration officials tell The Chicago Tribune. Daley's stated reason is to spend more time in his hometown of Chicago. Current budget director Jack Lew is set to take over the role at the end of the month. (Lew also served as budget director under Bill Clinton.) Though the administration was heading into a tough election year, the sources say Daley wasn't pushed out and that his resignation caught the president by surprise. Daley replaced original chief of staff Rahm Emanuel, who left for a successful run at Chicago's mayorship.