 And certainly we need to make sure that something like this doesn't happen again. Hoffman calls for an investigation into the incident and believes Secret Service protection should be given to independent presidential candidate Robert Kennedy Jr., whose father and uncle were victims of assassins' bullets. President Joe Biden addressing the nation once again, calling for peace in the wake of Saturday's assassination attempt on former President Donald Trump. He asked the country to lower the temperature in politics. We may disagree. We are not enemies.