Former Vice President Joe Biden, Democratic presidential nominee, left, and Senator Kamala Harris, Democratic vice presidential nominee, wear protective masks while holding hands outside the Chase Center during the Democratic National Convention in Wilmington, Delaware, U.S., on Thursday, Aug. 20, 2020. Biden accepted the Democratic nomination to challenge President Donald Trump, urging Americans in a prime-time address to vote for new national leadership that will overcome deep U.S. political divisions. Photographer: Stefani Reynolds/Bloomberg via Getty Images