She also released a plan to spend $12 billion on entrepreneurship programs aimed at the black community, her campaign said.
Harris is one of two dozen contenders in a field led by former Vice President Joe Biden seeking the Democratic nomination to challenge Republican President Donald Trump in the November 2020 election.
The daughter of immigrants from Jamaica and India, Harris has consistently polled behind Biden among black voters.
At last month's Democratic nominating contest debate, Harris took on Biden, who is white, over issues of race, and was rewarded with a bump in the polls.