House Republicans are vowing to ramp up attacks against Vice President Kamala Harris as some Democrats warm to the idea of her replacing President Joe Biden on the 2024 presidential ticket.

The National Republican Congressional Committee released a new ad Wednesday targeting Harris in the case that Democrats replace Biden as the party’s nominee before November. The ad accuses Harris of being the “enabler-in-chief,” citing Biden’s border policies, and argues the vice president deserves partial blame for the most unpopular decisions the Biden administration has made over the last three years.