Hillary Clinton’s campaign is going on air with a television spot Tuesday highlighting comments made by a top GOP lawmaker suggesting that the work of a Republican-created House committee helped lower her poll numbers.

The ad, titled "Admit," draws from comments made last week by House Majority Leader Kevin McCarthy, who is running for House Speaker, in which he credits the House committee investigating Benghazi with politically damaging Clinton.

The ad opens saying, "The Republicans finally admit it" and includes footage of McCarthy’s remarks. Politico reports that the video will air on MSNBC and CNN in the run-up to the first Democratic debate next Tuesday.

Since McCarthy made his initial comments in a Fox News interview last week, Clinton and other Democrats have seized on his remarks to validate their view that the GOP-run Benghazi investigation is nothing more than a political witch hunt.

"Everybody thought Hillary Clinton was unbeatable, right?" McCarthy said in a Fox News interview. "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 any of that had happened."

The ad is Clinton’s first on the House committee investigating the terrorist attacks on the U.S. diplomatic post in Benghazi, Libya, on Sept. 11, 2012. But she has been consistently sharpening her rhetoric on the issue in the week since McCarthy made his comments.

"We now have the ad we want." @davidbrockdc on McCarthy boasting that Benghazi committee led to Clinton poll drop http://t.co/Xv2n0gvtE4 — Matea Gold (@mateagold) October 2, 2015

Speaking at a Hollis, New Hampshire, town hall on Monday, Clinton said that she never would have established a House select committee to investigate Benghazi "for political reasons" if a GOP candidate had been the focus of the inquiry.

"I would never have done that. Look at the situation that they chose to exploit to go after me for political reasons — the death of four Americans in Benghazi," a visibly angry Clinton told NBC's Savannah Guthrie at a town hall event in Hollis.

The committee, Clinton said, was established "for the purpose of making a partisan political issue out of the deaths of four Americans." Clinton said she “would have done everything to shut it down."

She is set to appear before the committee Oct. 22.