Sen. Kamala Harris (D-Calif.) declared her candidacy on Jan. 21 and became the fourth woman to enter the 2020 presidential race. (Video: Melissa Macaya/The Washington Post)

Sen. Kamala D. Harris of California joined the 2020 presidential contest Monday, thrusting a daughter of immigrants from Jamaica and India into the Democratic race two years after she arrived in the Senate.

Harris, a 54-year-old former prosecutor raised in a state that has been the crucible of the Trump resistance, expanded a growing field of candidates fighting for the nomination of a party that is increasingly nonwhite and fueled by women alienated by the president.