It’s Michael Bloomberg’s last day as mayor. It’s also the last day for his most successful and controversial commissioner, Ray Kelly, whose NYPD drove crime down to historic lows but ended up in controversy after vastly expanding stop-and-frisk. In a lengthy interview with the Times, Kelly offered a blunt, Bloombergarian defense of his legacy: “Quite frankly…my poll numbers are great.” As we wrote earlier, Kelly has been consistently more popular than any of his predecessors, and, oftentimes, than the department itself. The Times calls Kelly’s predicament Shakespearean. There are hints, too, of Robert Caro’s zoom-out on Robert Moses: “Couldn’t people see what he had done? Why weren’t they grateful?”