As America chooses its next president in the midst of a historic pandemic, FRONTLINE investigates whose vote counts — and whose might not in the 2020 election. With Columbia Journalism Investigations and reporters from the USA TODAY NETWORK, New Yorker writer Jelani Cobb reports on allegations of voter disenfranchisement, how unfounded claims of extensive voter fraud entered the political mainstream, rhetoric, and realities around mail-in ballots, and how the pandemic could impact turnout.