Republican mayoral candidate Curtis Sliwa angrily quit his radio gig at 77 WABC on Wednesday in a fiery on-air showdown after its owner and one of the station’s most recognizable hosts called on him to drop out of the race. He raged on the station’s airwaves “you will never see me at the studios of WABC again” as he accused colleagues of betraying him and complained to host Sid Rosenberg that the station was giving preferable treatment to independent candidate, former Gov. Andrew Cuomo. “Let me just say Sid, I am directing my comments to everybody at WABC,” Sliwa told...