Washington (CNN) – Centrist Republican Sen. Susan Collins of Maine joined her GOP colleagues Wednesday in questioning the role Susan Rice – the U.S. ambassador to the United Nations – played in the days following a deadly attack at the American consulate in Benghazi, Libya.

Collins, speaking after a meeting with Rice on Capitol Hill, said Rice was playing a political role when she appeared on television to explain the attack that left four Americans dead stemmed from protests of an anti-Islam video. That video now appears not to have been a factor in the Benghazi attack.

"I still have many questions that remain unanswered," said Collins, who is recognized as one of the Senate's most moderate Republicans. "I continue to be troubled by the fact that the U.N. ambassador decided to play what was essentially a political role at the height of a contentious presidential election campaign by agreeing to go on the Sunday shows to present the administration's position."

She also said she was not ready to confirm support for Rice should she be nominated by President Barack Obama to become the next secretary of state. While no name has yet been put forth by the White House, many speculate Rice would be a top choice to succeed Hillary Clinton in the role of the nation's top diplomat.

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