On July 8th, 2016, former Congressman Joe Walsh published a tweet reacting to recent events involving shootings and the Black Lives Matter movement. His original tweet, which has since been deleted, said "3 Dallas cops killed, 7 wounded. This is now war. Watch out Obama Watch out black lives matter punks. Real America is coming after you."
Any threat against the President should immediately be fully investigated, whether it was taken back or not.