SENATOR Ted Cruz is calling for a criminal investigation into Twitter for potentially "violating US sanctions against Iran." Cruz asked for the investigation in a letter to the Justice and Treasury departments on Friday. In February, Cruz wrote a letter to Twitter CEO Jack Dorsey to ask him to stop providing social media services to Supreme Leader of Iran Ali Khamenei and Iranian Foreign Minister Javad Zarif. Now, the senator is calling on Attorney General William Barr and Secretary Steve Mnuchin to "take action." In Friday's letter, Cruz wrote: "I believe that the primary goal of (the International Emergency Economic...