President-elect Barack Obama plans to announce longtime advisers and political foes alike as his picks for top administration jobs at a Monday news conference, nominating one-time political nemesis Hillary Rodham Clinton as secretary of state.

Obama''s announcements include members of his national security team and beyond, completing the nominations for one-third of his Cabinet as he moves quickly to assemble the country''s new leadership in times of war and a troubled economy.

His selections include some of his most loyal campaign advisers and notably some who were not, including Democratic primary rival Clinton and President Bush''s defense secretary, Robert Gates, staying in his current post.

Obama also planned to name Washington lawyer Eric Holder as attorney general and Arizona Gov. Janet Napolitano as homeland security secretary, according to Democratic officials. He also planned to announce two senior foreign policy positions outside the 15-member Cabinet: campaign foreign policy adviser Susan Rice as U.N. ambassador and retired Marine General James L. Jones as national security adviser.

The Democratic officials disclosed the plans on a condition of anonymity Sunday because they were not authorized for public release ahead of the news conference.

Those names had been discussed before for those jobs, but the officials confirmed Sunday that Obama will make them official Monday in his hometown.

Last week, he named key members of his economic team, including Timothy Geithner, president of Federal Reserve Bank of New York, as treasury secretary. Obama is not yet ready to name his intelligence advisers, one Democratic official said.