PHILADELPHIA — I didn’t come for Mayor Jim Kenney when he stepped in it a couple of weeks ago. Even when he told reporters he’d “be happy” when he was not mayor anymore after the July Fourth shootings on the Parkway, I didn’t pounce or pile on — not that any of the resulting furor was unwarranted. When you’re the mayor of the nation’s sixth largest city, which is buckling under the weight of gun violence, you might not want to publicly say that you’re looking forward to leaving, no matter how fed up or frustrated you are. (Kenney later apologized.) But see, I was willing to entertain that, as …
