CHARLOTTE, NC – SEPTEMBER 06: Democratic vice presidential candidate, U.S. Vice President Joe Biden walks on stage during the final day of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. The DNC, which concludes today, nominated U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Chip Somodevilla/Getty Images) WILMINGTON, DE – AUGUST 12: Presumptive Democratic presidential nominee former Vice President Joe Biden and his running mate Sen. Kamala Harris (D-CA) arrive to deliver remarks at the Alexis Dupont High School on August 12, 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) DETROIT, MICHIGAN – MARCH 09: Sen. Kamala Harris (L) (D-CA), hugs Democratic presidential candidate former Vice President Joe Biden after introducing him at a campaign rally at Renaissance High School on March 09, 2020 in Detroit, Michigan. Michigan will hold its primary election tomorrow. (Photo by Scott Olson/Getty Images) DANVILLE, KY – OCTOBER 11: U.S. Vice President Joe Biden smiles during the vice presidential debate at Centre College October 11, 2012 in Danville, Kentucky. This is the second of four debates during the presidential election season and the only debate between the vice presidential candidates before the closely-contested election November 6. (Photo by Chip Somodevilla/Getty Images)