Story highlights Democrats claim comments by the House Republican prove the Benghazi investigation committee is "a political campaign against Hillary Clinton"

Rep. Adam Schiff, a Democratic member of the committee, said McCarthy's comments "laid bare the abusive purpose of this taxpayer funded committee"

McCarthy told CNN's Jake Tapper that Clinton's poll numbers have dropped because of their work on the committee.

Washington (CNN) Democrats are citing comments House Majority Leader Kevin McCarthy made Tuesday as proof that the House committee investigating the Benghazi terrorist attack is nothing more than "a political campaign against Hillary Clinton."

Speaking with Fox News, the California Republican described the effects of the Benghazi Select Committee -- a group meant to look into the deaths of four Americans in 2012.

"Everybody thought Hillary Clinton was unbeatable, right? But we put together a Benghazi special committee. A select committee. What are her numbers today? Her numbers are dropping. Why? Because she's untrustable. But no one would have known that any of that had happened had we not fought to make that happen," McCarthy said.

Democrats were quick to highlight and attack the comments by McCarthy, who is the front-runner to become the next speaker of the House. Democrats said his remarks confirm what they have long alleged about the committee: that it's aimed at making Clinton's 2016 presidential run more difficult.

"This stunning concession from Rep. McCarthy reveals the truth that Republicans never dared admit in public: the core Republican goal in establishing the Benghazi Committee was always to damage Hillary Clinton's presidential campaign and never to conduct an even-handed search for the facts," Rep. Elijah E. Cummings, the committee's top Democrat, said Wednesday.

Read More