 In the days since, revelations about the Secret Service's handling of security leading up to the event and during the attack have spurred lawmakers in both parties to demand explanations. Some Republicans have called for a shakeup at the Secret Service. The would-be assassin was shot dead by a Secret Service sniper moments after he fired eight bullets at the stage where Mr. Trump was speaking. Eyewitnesses who have spoken to reporters since Saturday have openly questioned how the shooter's suspicious behavior leading up to the shooting