President Obama's top national security adviser, Tom Donilon, is resigning. He'll be replaced by the U.S. Ambassador to the United Nations Susan Rice.

Conservatives severely criticized Rice after she blamed the last year's attack on the U.S. Consulate in Benghazi, Libya on a YouTube video.  Instead, it turned out to be a terrorist attack.
    
President Obama considered nominating Rice for secretary of state, but she withdrew amid Republican criticism over her handling of Benghazi.

Rice does not need Senate confirmation for her new position.