The Congressional Leadership Fund, a super PAC devoted to preserving and strengthening the Republican majority in the House, released a television ad Friday slamming Democratic candidate Conor Lamb for being “too liberal,” ahead of the March special election for Pennsylvania’s 18th Congressional District.

The ad ties Lamb to House Minority Leader Nancy Pelosi, D-Calif.

“How do we know Conor Lamb is a Pelosi liberal?” the ad says. “Lamb joined Pelosi to oppose your tax cut and to defend Obamacare.”

The ad says Lamb worked in the Obama administration “that encouraged sanctuary cities,” which allows illegal immigrants who commit crimes “back on the street.”

The ad points out that the Obama administration also negotiated the Iran deal, an arrangement that sought to place limits on Tehran’s nuclear program in exchange for sanctions relief.

The ad closes by saying Lamb and Pelosi are “too liberal on too many issues.”

Corry Bliss, CFL executive director, said that Lamb was was hiding his liberal views in order to get elected.

“Conor Lamb will say or do anything to get elected, and that includes being dishonest with Pennsylvania families about who he really is — an extreme liberal,” Bliss said in a statement. “The reality is Lamb continues to support Nancy Pelosi’s liberal agenda of higher taxes and more spending, and would be nothing more than a rubber stamp for her out-of-touch agenda in Congress.”

The group released an ad earlier this week that claimed Lamb and Pelosi are “still opposing your tax cut,” and asserted that the two are “too out of touch.”

Lamb is up against GOP candidate Rick Saccone. Trump expressed support for Saccone during an event in Pennsylvania last month and on Twitter.

“Will be going to Pennsylvania today in order to give my total support to RICK SACCONE, running for Congress in a Special Election (March 13),” Trump tweeted in January. “Rick is a great guy. We need more Republicans to continue our already successful agenda.”