The advocacy group Senate Conservatives Action announced Tuesday that it will spend six figures on a new television ad bashing Senate Minority Leader Mitch McConnell — but national Republicans are brushing off the buy.

Senate Conservatives Action, the PAC of the Senate Conservatives Fund that last week endorsed McConnell’s Republican primary opponent, Matt Bevin, will spend $330,000 to air the television ad across Kentucky, the group said. The 30-second spot attacks McConnell for his role in negotiations to end a 16-day government shutdown by restoring government funding, but without blocking the implementation of Obamacare.