WILMINGTON, DE - AUGUST 13: Presumptive Democratic presidential nominee former Vice President Joe Biden puts his mask back on after delivering remarks following a coronavirus briefing with health experts at the Hotel DuPont on August 13, 2020 in Wilmington, Delaware. Harris is the first Black woman and first person of Indian descent to be a presumptive nominee on a presidential ticket by a major party in U.S. history. (Photo by Drew Angerer/Getty Images)