Rep Dan Meuser, Who Was In Front Row Of Trump Rally, Gives First Hand Account

Rep. Dan Meuser: "Then the next shot, we knew that it was gunfire and we just fixated on the president. And it was just at that moment when he grabbed his head and hit the deck -- you could see he didn't fall down. He deliberately went down, and just highly concerned. We sitting here watching the assassination of a president. And so it was certainly chaotic."