De Blasio faces firestorm after officer murders

New York Mayor Bill de Blasio is facing a firestorm of criticism in the wake of the execution-style murder of two city police officers, as police union officials and ex-city leaders accuse him of stoking an atmosphere that made officers a target of "hate."

From his opposition to stop-and-frisk policies during his mayoral campaign to more recent comments about how he wanted his biracial son to be careful around police, the mayor's record on law enforcement is now front and center in an increasingly nasty war of words.

The fallout has even prompted a petition on Moveon.org calling for de Blasio's resignation -- so far, it has gathered nearly 60,000 signatures.

The accusations started flying almost immediately after authorities announced Saturday that officers Rafael Ramos and Wenjian Liu were fatally shot by a gunman who later killed himself. The suspect, 28-year-old Ismaaiyl Brinsley, had posted on Instagram that he was "putting wings on pigs" and suggested he was motivated by the deaths of Eric Garner and Michael Brown at the hands of police officers.