Former first lady Michelle Obama received some of the loudest cheers of the night in Chicago as she told the excited crowd, "Hope is making a comeback!"
President Trump and several cabinet members were rushed from the event in Washington, D.C. after several loud sounds were heard. The Secret Service appeared to have one person in custody.
Steve O'Donnell was introduced as the sanctioning body's chief executive officer at Talladega Superspeedway on Saturday and vowed to "make some moves" that will return the storied racing series to its roots.
President Trump says he has cancelled the trip of his representatives to the Iran peace talks in Islamabad, shortly after Iran's Foreign Minister left Pakistan.