 The FBI says it's received more than 2,600 tips so far. Investigators are now working in reverse from the shooting at all the moments leading up to it as they dissect the would-be assassin's life in the days and months prior to July 13th. Mr. Trump is now in Milwaukee ahead of the Republican National Convention, which begins today. Butler County, Pennsylvania District Attorney Richard Goldfeger says that the security was under the purview of the Secret Service. In the hierarchy of command...