 Now, the president again called his rival a threat to democracy. The head of Homeland Security calls the assassination attempt a security failure. And today, some House lawmakers will get us to the Secret Service briefing before a hearing Monday. GOP Congressman Nancy Mace tells Fox police were alerted there was a suspicious person on the top of the building at the rally. How is this even possible? We've all seen the interviews of citizens on the ground, rally goers who saw it, reported it, and it seemed like nothing happened or didn't happen fast enough.