Face the Nation on the Radio 10/4

President Trump tests positive for COVID-19. We'll have a new CBS News Battleground Tracker Poll AND talk to voters about how the most recent news will impact the election. Plus interviews with House Speaker Nancy Pelosi, LabCorps. CEO Adam Schechter, former FDA Commissioner Scott Gottlieb, and National Security Adviser Robert O'Brien and more on this week's "Face the Nation."