In this Jan. 21, 2019, photo, Sen. Kamala Harris, D-Calif., speaks to members of the media at her alma mater, Howard University in Washington. The 2020 presidential election already includes more than a half-dozen Democrats whose identities reflect the nation's growing diversity, as well as embody the coalition that helped Barack Obama first seize the White House in 2008. (AP Photo/Manuel Balce Ceneta)
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