What could make up the mind of an undecided voter? "Maybe the debates will help, but for now, Karen and Marlin Boltz remain genuinely stymied. The couple voted for Donald Trump four years ago, but they can’t stand how he’s divided the country and emboldened white supremacists. They like Joe Biden, but recoil at the idea of higher taxes and bigger spending." Marc Fisher, Christine Spolar, and Amy B. Wang, from The Washington Post, talk to the undecided voters in the US about what could swing their vote in the upcoming presidential election.