Democrats failed on Wednesday to secure the votes necessary to disband the Benghazi committee that has been investigating how four Americans – including a U.S. ambassador – were killed in an attack on the U.S. Consulate in eastern Libya in 2012.

One of the Democrats on the committee who voted to disband was Rep. Tammy Duckworth, D-Ill., who is running for Senate and who received an endorsement from Hillary Clinton in early September. Clinton is one of the main subjects of the Benghazi investigation, as she was secretary of state when the attack occurred.