Democratic U.S. presidential candidate and former Vice President Joe Biden is greeted by U.S. Senator Kamala Harris during a campaign stop in Detroit, Michigan, U.S., March 9, 2020. REUTERS/Brendan McDermid

U.S. Senator Kamala Harris (D-CA) speaks during a Senate Homeland Security and Governmental Affairs Committee oversight hearing examining the U.S. Customs and Border Protection (CBP) on Capitol Hill in Washington, U.S., June 25, 2020. REUTERS/Al Drago/Pool

Democratic 2020 U.S. presidential candidate and U.S. Senator Kamala Harris (D-CA) takes the stage for a campaign stop at Keene State College in Keene, New Hampshire, U.S., April 23, 2019. REUTERS/Brian Snyder TPX IMAGES OF THE DAY

Democratic presidential candidate and former Vice President Joe Biden holds his notes, including the topics Kamala Harris and Department of Justice reform, as he addresses reporters at a campaign event in Wilmington, Delaware, U.S., July 28, 2020. REUTERS/Jonathan Ernst

Former Vice President Joe Biden talks with Senator Kamala Harris after the conclusion of the 2020 Democratic U.S. presidential debate in Houston, Texas, U.S., September 12, 2019. REUTERS/Mike Blake

Democratic U.S. Presidential candidate Senator Kamala Harris laughs during the Presidential candidate forum at the annual convention of the National Association for the Advancement of Colored People (NAACP), in Detroit, Michigan, U.S., July 24, 2019. REUTERS/Rebecca Cook TPX IMAGES OF THE DAY

U.S. Senator and Democratic presidential hopeful Kamala Harris puts hot sauce on her greens while eating lunch at Rodney Scott's BBQ in Charleston, South Carolina, U.S. February 15, 2019. Picture taken on February 15, 2019. REUTERS/Elijah Nouvelage

WASHINGTON, DC - AUGUST 06: U.S. Sen. Kamala Harris (D-CA) listens during a hearing before Senate Homeland Security and Governmental Affairs Committee at Dirksen Senate Office Building August 6, 2020 on Capitol Hill in Washington, DC. The committee held a hearing on "Oversight of DHS Personnel Deployments to Recent Protests." Alex Wong/Pool via REUTERS

U.S. Senator Kamala Harris points at former Vice President Joe Biden on the second night of the second 2020 Democratic U.S. presidential debate in Detroit, Michigan, July 31, 2019. REUTERS/Lucas Jackson TPX IMAGES OF THE DAY

U.S. Senator Kamala Harris squeezes the cheeks of a young man after she had him shake her hand instead of making a high-five while greeting supporters following her first organizing event in Los Angeles as she campaigns in the 2020 Democratic presidential nomination race in Los Angeles, California, U.S., May 19, 2019. REUTERS/Mike Blake TPX IMAGES OF THE DAY

Democratic presidential candidate California Sen. Kamala Harris attends the SEIU's Unions for All summit in Los Angeles, California, U.S. October 4, 2019. REUTERS/Eric Thayer

Democratic 2020 U.S. presidential candidate and U.S. Senator Kamala Harris (D-CA) and her husband Douglas Emhoff leave a campaign stop at Keene State College in Keene, New Hampshire, U.S., April 23, 2019. REUTERS/Brian Snyder

Former Vice President Joe Biden approaches U.S. Senator Kamala Harris during a commercial break on the second night of the second 2020 Democratic U.S. presidential debate in Detroit, Michigan, July 31, 2019. REUTERS/Lucas Jackson TPX IMAGES OF THE DAY

Senator Kamala Harris gives a thumbs down as she speaks during the 2020 Democratic U.S. presidential debate in Houston, Texas, U.S., September 12, 2019. REUTERS/Mike Blake TPX IMAGES OF THE DAY

U.S. Democratic presidential candidate and U.S. Senator Kamala Harris (D-CA), joins a demonstration with striking McDonalds workers demanding a $15 minimum wage in Las Vegas, Nevada U.S., June 14, 2019. REUTERS/Mike Segar

U.S. 2020 Democratic presidential candidate Kamala Harris greets a young supporter at the end of a rally at Texas Southern University in Houston, Texas, U.S., March 23, 2019. REUTERS/Loren Elliott TPX IMAGES OF THE DAY

U.S. Senator Cory Booker (D-NJ) and Senator Kamala Harris (D-CA) look on during the Senate Judiciary Committee hearing titled "Police Use of Force and Community Relations" in Dirksen Senate Office Building in Washington, D.C., U.S., June 16, 2020. Tom Williams/Pool via REUTERS TPX IMAGES OF THE DAY

U.S. Senator Kamala Harris launches her campaign for President of the United States at a rally at Frank H. Ogawa Plaza in her hometown of Oakland, California, U.S., January 27, 2019. REUTERS/Elijah Nouvelage TPX IMAGES OF THE DAY

Democratic 2020 U.S. presidential candidate and U.S. Senator Kamala Harris (D-CA) gestures during a meeting with Rev. Al Sharpton at Sylvia’s Restaurant in the Harlem section of New York City, New York U.S., February 21, 2019. REUTERS/Carlo Allegri TPX IMAGES OF THE DAY

Democratic 2020 U.S. presidential candidate and U.S. Senator Kamala Harris (D-CA) poses for a photograph with audience members following a campaign town hall meeting in Portsmouth, New Hampshire, U.S., February 18, 2019. REUTERS/Brian Snyder

Democratic 2020 U.S. presidential candidate and U.S. Senator Kamala Harris (D-CA) and her sister and campaign chairwoman Maya (R) order during a campaign visit to the Narrow Way Cafe and Shop in Detroit, Michigan, U.S., July 29, 2019. REUTERS/Brian Snyder

U.S. Democratic presidential candidate Sen. Kamala Harris (D-CA) listens to a question from the audience during a forum held by gun safety organizations the Giffords group and March For Our Lives in Las Vegas, Nevada, U.S. October 2, 2019. REUTERS/Steve Marcus

2020 Democratic U.S. presidential candidate and U.S. Senator Kamala Harris (D-CA) flips pork chops on a grill at the Iowa Pork Producers stand at the Iowa State Fair in Des Moines, Iowa, U.S., August 10, 2019. REUTERS/Brian Snyder

Democratic 2020 U.S. presidential candidate and U.S. Senator Kamala Harris (D-CA) listens to a question from a reporter after a campaign stop in Somersworth, New Hampshire, U.S., July 14, 2019. REUTERS/Brian Snyder

Democratic presidential candidate Kamala Harris joins supporters of the LGBTQ community at the Pride Parade in San Francisco, California, U.S., June 30, 2019. REUTERS/Stephen Lam

Democratic presidential candidate Sen. Kamala Harris shares a moment with old friend Rep. Barbara Lee and Carlottia Scott at a campaign Women's Meet & Greet event at a home in Columbia, South Carolina, U.S., June 21, 2019. Picture taken June 21, 2019. REUTERS/Leah Millis

Democratic presidential candidates stand on stage together, including all of the women running, Marianne Williamson, Sen. Kamala Harris, Sen. Amy Klobuchar, Sen. Elizabeth Warren, Rep. Tulsi Gabbard, and Sen. Kirsten Gillibrand during Jim Clyburn's World Famous Fish Fry in Columbia, South Carolina, U.S., June 21, 2019. Picture taken June 21, 2019. REUTERS/Leah Millis

Democratic 2020 U.S. presidential candidate and U.S. Senator Kamala Harris (D-CA) takes the stage for a campaign town hall meeting in Portsmouth, New Hampshire, U.S., February 18, 2019. REUTERS/Brian Snyder TPX IMAGES OF THE DAY

Democratic 2020 U.S. presidential candidate and U.S. Senator Kamala Harris (D-CA) speaks during a campaign stop in Somersworth, New Hampshire, U.S., July 14, 2019. REUTERS/Brian Snyder

U.S. Senator Kamala Harris greets supporters as her husband Douglas Emhoff looks on following her first organizing event in Los Angeles as she campaigns in the 2020 Democratic presidential nomination race in Los Angeles, California, U.S., May 19, 2019. REUTERS/Mike Blake

U.S. Senator Kamala Harris (D-CA) talks to colleagues prior to the start of a ceremony for the late Rep. John Lewis (D-GA) at the Capitol in Washington, D.C., U.S., July 27, 2020. J. Scott Applewhite/Pool via REUTERS

Democratic 2020 U.S. presidential candidate Sen. Kamala Harris speaks at a Democratic Party fundraising dinner, the Liberty and Justice Celebration, in Des Moines, Iowa, U.S. November 1, 2019. REUTERS/Eric Thayer

Democratic 2020 U.S. presidential candidate Senator Kamala Harris (D-CA) reacts during a televised townhall on CNN dedicated to LGBTQ issues in Los Angeles, California, U.S. October 10, 2019. REUTERS/Mike Blake

U.S. Democratic presidential candidate Sen. Kamala Harris (D-CA) reacts during a forum held by gun safety organizations the Giffords group and March For Our Lives in Las Vegas, Nevada, U.S. October 2, 2019. REUTERS/Steve Marcus

Former Vice President Joe Biden talks with Senator Elizabeth Warren (C) and Senator Kamala Harris (R) after the conclusion of the 2020 Democratic U.S. presidential debate in Houston, Texas, U.S. September 12, 2019. REUTERS/Mike Blake

2020 Democratic U.S. presidential candidate and U.S. Senator Kamala Harris (D-CA) attends a health care roundtable at the Loft at the First United Methodist Church in Burlington, Iowa, U.S., August 12, 2019. REUTERS/Eric Thayer TPX IMAGES OF THE DAY

2020 Democratic U.S. presidential candidate and U.S. Senator Kamala Harris (D-CA) arrives at the Iowa State Fair in Des Moines, Iowa, U.S., August 10, 2019. REUTERS/Brian Snyder

Candidates former Vice President Joe Biden and U.S. Senator Kamala Harris take the stage on the second night of the second 2020 Democratic U.S. presidential debate in Detroit, Michigan, July 31, 2019. REUTERS/Lucas Jackson

Candidates former Vice President Joe Biden and U.S. Senator Kamala Harris on the second night of the second 2020 Democratic U.S. presidential debate in Detroit, Michigan, July 31, 2019. REUTERS/Lucas Jackson

Democratic 2020 U.S. presidential candidate and U.S. Senator Kamala Harris (D-CA) greets guests at a campaign house party in Gilford, New Hampshire, U.S., July 14, 2019. REUTERS/Brian Snyder

Democratic presidential candidate Kamala Harris reacts as Ryan Kyote donates to her campaign during the Pride Parade in San Francisco, California, U.S., June 30, 2019. REUTERS/Stephen Lam

United States Senator Kamala Harris, United States Senator Kirsten Gillibrand and Mayor Pete Buttigieg are denied entry at a dentition facility for incarcerated youths near Miami in Homestead, Florida, U.S., June 28, 2019. REUTERS/Carlo Allegri

Democratic presidential candidate and U.S. Senator Kamala Harris (D-CA) campaigns during a SEIU California Democratic Delegate Breakfast in San Francisco, California, U.S. June 1, 2019. REUTERS/Stephen Lam TPX IMAGES OF THE DAY

U.S. Senator Kamala Harris holds her first organizing event in Los Angeles as she campaigns in the 2020 Democratic presidential nomination race in Los Angeles, California, U.S., May 19, 2019. REUTERS/Mike Blake TPX IMAGES OF THE DAY

Douglas Emhoff, husband of Democratic 2020 U.S. presidential candidate and U.S. Senator Kamala Harris (D-CA), waits backstage at a campaign stop at Keene State College in Keene, New Hampshire, U.S., April 23, 2019. REUTERS/Brian Snyder