Party officials say Illinois Congressman Rahm Emanuel, a key member of the Democratic leadership inthe House of Representatives, has accepted President-elect Barack Obama's call to serve him as chief of staff, the Associated Press reported.Choosing Emanuel was one of Obama's first decisions after becoming president-elect in Tuesday's election.The hard-charging fellow Chicagoan accepted the job after struggling over family and political considerations. By moving into a top White House job for a second time, Emanuel will have to put aside hopes of becoming speaker of the lower chamber.He was a key figure in the administration of former President Bill Clinton, where he was known for his blunt management style. His selection is a shift in tone for Obama, who chose more low-key leadership for his presidential campaign.