Via Politico:

The anti-illegal guns group founded by New York City Mayor Mike Bloomberg is going on air tomorrow with a spot that invokes the Sandy Hook massacre and features the mother of the young girl slain in the Tuscon, Ariz., rampage two years ago urging Washington to ā€œstand up to the gun lobby.ā€

The ad, paid for by the Mayors Against Illegal Guns, will go on broadcast television for a single-day buy on the two-year anniversary of the Tuscon shooting, which nearly claimed the life of former Rep. Gabrielle Giffords.