AdvertisementSKIP ADVERTISEMENTJustice Department officials are in the late stages of investigating the iPhone maker, focusing on how Apple has used its other products and services to defend against threats to its core business.The Justice Department is focused on how Apple has used its control over the iPhone’s software and hardware to make its devices and services work better together.Credit...Karsten Moran for The New York TimesDavid McCabe and Tripp MickleDavid McCabe, who covers tech policy...