tonight, the cdc's surprising letter to local health officials. be ready to distribute a coronavirus vaccine by november 1st. all states put on notice, prepare for a possible vaccine just before election day. the letter raising concerns the trump administration may be trying to politicize a vaccine. tonight, growing outbreaks raising concerns at schools and college campuses. images of hallways packed with children, and now, an even bigger problem. some colleges sending infected students home. health officials say that's exactly what not to do. pandemic politics shaping the race for 2020. joe biden zeroing in on president trump's handling of the outbreak, calling it a failure, including the lack of a national plan to reopen america's schools. the president also on the trail greeting supporters crowded