Free college tuition is not a new political promise, but Harris says it will be a hallmark of her campaign.
“We need to make community college free for all students. And for families who earn less than $140,000 in a household, their tuition should be free at any public college,” said Harris.
She continues to hold a sizeable lead over Orange County Rep. Loretta Sanchez, according to a poll released early Wednesday.
Harris, who is California's current attorney general, has the support of California Gov. Jerry Brown, a majority of the state party, President Obama and Vice President Biden.