Who Is to Blame for Trump Rally Security Lapse?

The blame game is on, as the Secret Service and local law enforcement each say the other was responsible for securing the building from which Trump's would-be assassin fired. So far, no one can explain why 30 minutes elapsed from when the shooter was first spotted and those fatal shots were fired. Thomas Matthew Crooks had been spotted acting suspiciously near the metal detectors; he was seen carrying a range finder and a backpack. Ann Mercogliano has more.