President Joe Biden has endorsed his vice president, Kamala Harris, as the Democratic nominee after saying he's withdrawing from the presidential race. Harris made history as the first woman of color to serve as the vice president of the United States. A former lawyer, state attorney general, and senator, Harris has now had almost four years to prove herself on the national and international stage. Her defense of women's rights, an unsuccessful record on immigration reform, and her outspoken attacks on Donald Trump will all be in the spotlight as an unpredictable campaign season continues.