NY Gov Andy Cuomo’s once stratospheric approval ratings have hit a slide — the gun-control law Cuomo pushed through the Legislature in January following the Newtown massacre helped drive the Democrat’s job approval ratings from 74 percent last December to 55 percent last month in Quinnipiac polls......he was losing in the New York suburbs and upstate to GOP Gov. Chris Christie of New Jersey in a hypothetical presidential run. The GOP believes Cuomo's politically exploitable missteps, include: * Delaying on the natural-gas drilling technique known as fracking, which has divided the state. * Obtaining luxury seats for himself and top...