The former New York City mayor is dedicating himself to a new group that will organize voters who support gun control; called Everytown for Gun Safety, it will subsume his existing groups (Mayors Against Illegal Guns and Moms Demand Action for Gun Sense), and it will focus specifically on expanding background checks. His previous approach was to fund ad campaigns in races where gun control was an issue. Here's how he matches up with his arch-rival. Money Bloomberg says he'll be putting at least $50 million into the project this year -- and according to the New York Times, he...