WASHINGTON (AP) — Republicans who have accused U.N. Ambassador Susan Rice of being part of a cover-up in the Benghazi attacks in Libya are offering a muted response to her selection to be President Barack Obama's new national security adviser.

Rice has been a lightning rod for Republican criticism over the Obama administration's initial explanations for the attacks that killed the U.S. ambassador and four others. Relying on talking points from the intelligence community, Rice said in television interviews that the attacks were likely spontaneous, which was later proven incorrect.

Sen. John McCain writes on Twitter that he disagrees with the appointment, but that he will "make every effort" to work with her on important matters. Tennessee Republican Sen. Bob Corker, the top Republican on the Foreign Relations Committee, says he has spoken with Rice, and looks forward to "working with her on shaping important foreign policy and national security issues."

The post of national security adviser is not one that requires Senate confirmation.

Rice will be replacing Tom Donilon, whose resignation had been expected.

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129-c-21-(Mark Smith, AP White House correspondent)-"require Senate approval"-AP White House Correspondent Mark Smith reports Obama's choice of Susan Rice to be his new national security adviser will be controversial. (5 Jun 2013)

<<CUT *129 (06/05/13)>> 00:21 "require Senate approval"

126-v-35-(Mark Smith, AP White House correspondent)--President Obama is shaking up his national security team. AP White House Correspondent Mark Smith reports. (5 Jun 2013)

<<CUT *126 (06/05/13)>> 00:35

APPHOTO WX202: FILE - In this Feb. 12, 2013 file photo, U.S. Ambassador Susan Rice speaks at a news conference at U.N. headquarters in New York. 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. (AP Photo/Craig Ruttle, File) (12 Feb 2013)

<<APPHOTO WX202 (02/12/13)>>

APPHOTO NY121: FILE - National Security Advisor Tom Donilon speaks during the daily news briefing at the White House, in this May 17, 2012 file photo taken in Washington. A White House official said Wednesday June 5, 2013 Tom Donilon is resigning as President Barack Obama's national security adviser and will be replaced by Susan Rice. (AP Photo/Carolyn Kaster, File) (17 May 2012)

<<APPHOTO NY121 (05/17/12)>>