 Trump held his first rally since that shooting last night in Grand Rapids, Michigan. It was his first appearance on the campaign trail with his running mate, J.D. Vance. President Biden remains in Delaware, where he's being treated for COVID as he's resisted calls to drop out of the race. Airlines and other services continuing to try to catch up after Friday's global I.T. outage. So far today, more than 500 Delta and United flights have been canceled. This is ABC News.