2016 United States presidential election

FILE - In this July 9, 2020, file photo Democratic presidential candidate, former Vice President Joe Biden adjusts his mask during a tour of McGregor Industries, a metal fabricating facility in Dunmore, Pa. Biden is pledging to define his presidency by a sweeping economic agenda beyond anything Americans have seen since the Great Depression and the industrial mobilization for World War II. (AP Photo/Matt Slocum, File)

FILE - In this April 18, 2017, file photo Manhattan District Attorney Cyrus R. Vance, Jr. arrives to talk to reporters in New York. The Supreme Court ruled on Thursday, July 9, 2020, that Vance can obtain President Donald Trump's tax returns for a criminal investigation, but sent a second request by Congress for the records back to lower courts. Here are some key questions and answers stemming from the decision. (AP Photo/Mary Altaffer, File)

Democratic presidential candidate former Vice President Joe Biden speaks at McGregor Industries in Dunmore, Pa., Thursday, July 9, 2020. (AP Photo/Matt Slocum)

The Supreme Court building is photographed early Thursday, July 9, 2020, in Washington. (AP Photo/Andrew Harnik)

Democratic presidential candidate, former Vice President Joe Biden speaks at Alexis Dupont High School in Wilmington, Del., Tuesday, June 30, 2020. (AP Photo/Patrick Semansky)

FILE - In this June 1, 2020, file photo, President Donald Trump holds a Bible as he visits outside St. John's Church across Lafayette Park from the White House in Washington. Trump began June with his Bible-clutching photo op outside the church after authorities used chemicals and batons to scatter peaceful demonstrators, and the month never got less jarring or divisive. Now, some Republicans are expressing concern about the month's impact on their party's ability to hold the Senate. (AP Photo/Patrick Semansky, File)

A Mississippi Highway Safety Patrol honor guard folds the retired Mississippi state flag after it was raised over the Capitol grounds one final time in Jackson, Miss., on July 1, 2020. Vestiges of the Civil War and Jim Crow segregation are coming down across the Old Confederacy as part of a national reckoning on race and white supremacy. A diversifying Democratic Party hopes the changes in symbols are part of a more fundamental shift in a region that dominated by Republicans for a generation – and white conservative Democrats a century before that. (AP Photo/Rogelio V. Solis)

Democratic presidential candidate former Vice President Joe Biden speaks at Alexis Dupont High School in Wilmington, Del., on June 30, 2020. As his bid for a second term faces growing obstacles, President Donald Trump’s primacy in the dizzying digital world is one of his top advantages, giving him a massive platform to connect with supporters and push a message that ignores his vulnerabilities related to the pandemic, unemployment and race relations. Biden and his allies are working feverishly to establish a social media force of their own. (AP Photo/Patrick Semansky)

FILE - In this Feb. 11, 2020 file photo, Democratic presidential candidate former South Bend, Ind., Mayor Pete Buttigieg pauses as he speaks to supporters at a primary night election rally in Nashua, N.H. Buttigieg’s presidential candidacy, though ending far short of its goal, will likely go down in history books as a success: proof of the remarkable advances made by LGBT Americans in their quest for equality and acceptance. (AP Photo/Mary Altaffer)

FILE - In this June 17, 2020, file photo, Senate Majority Leader Mitch McConnell of Ky., leaves a news conference on Capitol Hill in Washington. For more than three years, President Donald Trump instilled such fear in the Republican Party's leaders that most kept criticism of his turbulent leadership or inconsistent politics to themselves. That's beginning to change. While Trump avoids wearing a mask in public, McConnell said facial coverings are “really important” until a vaccine is found. (AP Photo/Andrew Harnik, File)