Democratic Sen. Kamala Harris, of California, waves to the crowd as she formally launches her presidential campaign at a rally in her hometown of Oakland, Calif., Sunday, Jan. 27, 2019. (Tony Avel …

Democratic Sen. Kamala Harris, of California, waves to the crowd as she formally launches her presidential campaign at a rally in her hometown of Oakland, Calif., Sunday, Jan. 27, 2019. (Tony Avelar/AP)