Donald Trump attended the wake of a slain NYPD police officer who was shot and killed during a traffic stop this week. Speaking to reporters during a press conference, Trump said, “What happened is such a sad, sad event, such a horrible thing.” Officer Jonathan Diller was with another officer when he approached an illegally parked vehicle and asked suspects Lindy Jones and Guy Rivera to move before Rivera opened fire. “We have to stop it. We have to stop it,” Trump told reporters in video shared by ABC News. “We have to get back to law and order. We have to do a lot of things differently, beca…