The Battle for the Ballot – Bill Whitaker reports on the battle over rules for mail-in voting in the critical swing state of Pennsylvania, which could impact who wins the state and the presidency. H.R. McMaster – In his first interview about his new book, the president's former national security advisor, retired Lt. Gen. H.R. McMaster, sounds the alarm on China, cautions against a hasty troop withdrawal from Afghanistan, and says challenges to U.S. national security are growing and making the country less safe. Scott Pelley is the correspondent. Coach O and the Sideways Season – Ed Orgeron took the LSU Tigers to the national college football championship. Now the head coach faces a new and fierce opponent as he attempts to defend the title amid the coronavirus pandemic. Jon Wertheim is the correspondent.