Did our taxes buy those blackberries? If so, he was stealing from We the People of the United States of America - every one of us.
The Whitehouse should bar this man from ever entering this country again. (and his little dog too!)
More than that, he was caught in an act of espionage against the United States by a diplomat. Those blackberries also hold phone records, files and God only knows what else. I believe that falls under causus belli.