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 Tuesday, March 10, 2020, file photo, specialists James Denaro, left, and Mario Picone work on the floor of the New York Stock Exchange. Global stock markets and Wall Street futures rose Thursday, July 2, 2020, on hopes for the development of a coronavirus vaccine and ahead of the release of monthly U.S. jobs data. (AP Photo/Richard Drew, File)

FILE - In this Tuesday, June 30, 2020, file photo, a woman shops for clothing in a Gap store during the coronavirus pandemic, in New York. U.S. employers likely rehired several million more workers in June, thereby reducing a Depression-level unemployment rate, but the most up-to-date data suggests that a resurgent coronavirus will limit further gains. (AP Photo/Mark Lennihan, File)

President Donald Trump swings a baseball bat during the Spirit of America Showcase at the White House, Thursday, July 2, 2020, in Washington. (AP Photo/Evan Vucci)

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

President Donald Trump speaks during a news briefing at the White House, Thursday, July 2, 2020, in Washington, as White House chief economic adviser Larry Kudlow, left, and Treasury Secretary Steven Mnuchin, look on. (AP Photo/Evan Vucci)

President Donald Trump speaks during the Spirit of America Showcase at the White House, Thursday, July 2, 2020, in Washington. (AP Photo/Evan Vucci)