In this image from video made available before the start of the convention, former Secretary of State Colin Powell speaks during the second night of the Democratic National Convention on Tuesday, Aug. 18, 2020. (Democratic National Convention via AP)

In this image from video, Democratic presidential candidate former Vice President Joe Biden, his wife Jill Biden, and members of the Biden family, celebrate after the roll call vote during the second night of the Democratic National Convention on Tuesday, Aug. 18, 2020. (Democratic National Convention via AP)

In this image from video, Democratic presidential candidate former Vice President Joe Biden leads a conversation on racial justice with Art Acevedo, Jamira Burley, Gwen Carr, Derrick Johnson and Lori Lightfoot during the first night of the Democratic National Convention on Monday, Aug. 17, 2020. (Democratic National Convention via AP)

In this image from video, Caroline Kennedy and Jack Schlossberg speak during the second night of the Democratic National Convention on Tuesday, Aug. 18, 2020. (Democratic National Convention via AP)

In this image from video, former President Bill Clinton speaks during the second night of the Democratic National Convention on Tuesday, Aug. 18, 2020. (Democratic National Convention via AP)

Senate Minority Leader Sen. Chuck Schumer of N.Y., speaks during a news conference on Capitol Hill in Washington, Thursday, Aug. 6, 2020. (AP Photo/Jose Luis Magana)

In this image from video, former Acting Attorney General Sally Yates speaks during the second night of the Democratic National Convention on Tuesday, Aug. 18, 2020. (Democratic National Convention via AP)

Rep. Alexandria Ocasio-Cortez, D-NY, speaks during a news conference outside the United Stats Postal Service Jamaica station, Tuesday, Aug. 18, 2020, in the Queens borough of New York. The Postal Service said it has stopped removing mailboxes and mail-sorting machines amid an outcry from lawmakers, as President Donald Trump denied he was slowing service. Democrats and some Republicans say actions by a Trump ally and a major Republican donor, new Postmaster General Louis DeJoy, have endangered millions of Americans who rely on the Postal Service for prescription drugs and other needs. (AP Photo/John Minchillo)

Sen. Chris Coons, D-Del., speaks during a Senate Judiciary Committee oversight hearing on Capitol Hill in Washington, Wednesday, Aug. 5, 2020, to examine the Crossfire Hurricane investigation. (Erin Schaff/The New York Times via AP)

Convention Secretary Jason Rae directs the roll call vote of the states as delegates cast their votes for former Vice President Joe Biden to become their 2020 nominee for President on the second night of the virtual 2020 Democratic National Convention in Milwaukee, Wisc., Tuesday, Aug. 18, 2020. (Brian Snyder/Pool via AP)

In this image from video, the slate reading 'A Different Kind of Keynote' is displayed during the second night of the Democratic National Convention on Tuesday, Aug. 18, 2020. (Democratic National Convention via AP)