Days after New York Rep. Max Rose dropped a short political ad slamming fellow New York Mayor Bill de Blasio, a Democrat, for being “the worst mayor in the history of New York City,” a Republican super PAC piled on with its own ad.

In the ad, which comes from the Congressional Leadership Fund, New York City law enforcement officers from Rose’s 11th Congressional District criticize the New York Democrat for marching with Black Lives Matter protesters on Staten Island in June.