Obama to Tap Summers, Geithner

Obama faces unusual challenges and has moved quickly in assembling his team. Former President George H.W. Bush made his first Cabinet pick the day after his election in 1988, but former President Clinton did not name any members until after Thanksgiving. President George W. Bush's transition was delayed by the contested result in Florida.

While speculation has been rampant about most top-level appointments, there has been relatively little about Obama's choice for defense secretary. His aides encouraged speculation before the election that Robert Gates, who now holds the position, would remain in office for an interim period.

Former Senate Majority Leader Tom Daschle of South Dakota has been chosen as secretary of health and human services and Arizona Gov. Janet Napolitano is likely to be named as secretary of the Homeland Security Department.

Napolitano was an early supporter of candidate Obama among the ranks of Democratic governors, as was Kathleen Sebelius of Kansas. Sebelius has figured prominently in recent days in speculation as possible secretary of labor.

Additionally, retired Gen. James Jones, a former Marine Corps commandant and NATO commander, was among those under consideration for national security adviser. James Steinberg, an Obama campaign aide who served in Clinton's White House, was another possibility, according to officials.

Obama has repeatedly referred to the economic crisis as the top priority for his new administration.

Geithner held posts in the Treasury Department under three administrations and five secretaries before moving to the New York Fed in 2003. He also held positions at the International Monetary Fund and was employed at the private firm of former Secretary of State Henry Kissinger.