President Barack Obama's top national security adviser Tom Donilon is resigning and will be replaced by U.S. ambassador to the United Nations Susan Rice, marking a significant shakeup to the White House foreign policy team.

White House official confirmed the personnel changes Wednesday morning ahead of a planned announcement by the president later in the day.

Donilon has been a key foreign policy adviser to Obama since he first took office. But the 58-year-old had been expected to depart sometime this year, with Rice seen as the likely candidate to replace him.

Rice, a close Obama confidante, came under withering criticism from Republicans as part of the investigations into the deadly attack on a U.S. compound in Benghazi, Libya. Rice, relying on talking points from the intelligence community, said in television interviews that the attacks were likely spontaneous, which was later proven incorrect.

Read it at Yahoo.