Susan Rice may become Obama's national security chief

Susan Rice, the U.S. ambassador to the United Nations who lost out in a bruising bid for the job of secretary of state, has emerged as the front-runner to succeed Tom Donilon as President Barack Obama's national security adviser later this year, according to an administration official familiar with the president's thinking.

The job would place her at the nexus of foreign policy decision-making and allow her to rival the influence of Secretary of State John Kerry in shaping the president's foreign policy.

The appointment would mark a dramatic twist of fortune for Rice, whose prospects to become the country's top diplomat fizzled last year after a round of television appearances in which she provided what turned out to be a flawed account of a Sept. 11 terrorist attack on the U.S. diplomatic mission in Benghazi, Libya.

That episode ignited a firestorm of criticism from Senate Republicans, who questioned her honesty and vowed to oppose her nomination, and exposed misgivings from more liberal detractors who questioned whether her temperament, her family's investments and her relations with African strongmen made her unfit to lead the State Department.