U.S. Ambassador to the United Nations Susan Rice failed Tuesday to convince Republican senators that she’s not to blame for providing misleading information about the attack in Benghazi, Libya — raising new doubts about her potential nomination to be secretary of State.

During a meeting on Capitol Hill that lasted for more than an hour, Rice acknowledged “there was no protest” at the consulate in Benghazi on Sept. 11 and said that talking points she relied on for making that claim were wrong.

But Republican Sens. Lindsey Graham (S.C.), John McCain (Ariz.) and Kelly Ayotte (N.H.) said they were not satisfied with the ambassador’s answers to their questions.

“Bottom line, I’m more disturbed now than I was before [by] the 16 September explanation about how four Americans died in Benghazi, Libya, by Ambassador Rice,” said Graham.