President Obama has chosen controversial United Nations Ambassador Susan Rice to serve as his National Security Adviser, replacing Tom Donillon, who is resigning.

Obama will announce the appointment in the Rose Garden at 2:15 this afternoon. Donilon is expected to depart early next month.

White House adviser Samantha Power, who serves on the National Security Council, will be named to replace Rice as U.N. ambassador.

Rice’s new post is within the White House and does not require Senate confirmation. Rice was passed over by Obama for Secretary of State earlier this year amid harsh criticism from Republicans for appearing on talk shows after the Benghazi attacks touting the idea that a video was responsible. It had become clear she could not be confirmed.

Rice served on the staff of the National Security Council during the Clinton administration. While at the NSC , she was director for international organizations and peacekeeping from 1993 to 1995 and special assistant to the president and senior director for African affairs from 1995 to 1997. In 1997, President Clinton appointed her Assistant Secretary of State for African Affairs, a post she held for the rest of Clinton’s term.

Rice has been criticized for playing a role in the failure of the Clinton administration to prevent the 1994 Rwanda genocide, reportedly saying at the time, “If we use the word ‘genocide’ and are seen as doing nothing, what will be the effect on the November (midterm) election?”

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