Donald Trump is calling for a boycott on Apple products until it agrees to help unlock the cellphone of one of the San Bernardino shooters.  Apple CEO Tim Cook has resisted calls to develop a hacking tool for iPhones.  He says doing so would undermine Apple's security advancements. 

On the campaign trail today, Trump said people should boycott Apple until they help out in the investigation of the shooting that killed 14 people in December.  It's not the first time that Trump has targeted Apple.  He has repeatedly called for the company to move production to the United States.