Sen. Kamala Harris is set to launch a 2020 presidential bid on or around MLK Day, KCBS Radio reports.

Harris, the former attorney general for the state of California, has been on a media tour for her new book The Truths We Hold: An American Journey. Women of color overwhelmingly backed Kamala Harris in a recent poll.

The Democratic field is expected to be large with former Vice President Joe Biden, Beto O’Rourke, Cory Booker, John Hickenlooper, Mike Bloomberg and Bernie Sanders mulling a possible bid.

So far, Sen. Elizabeth Warren and Julian Castro have announced they have set up exploratory committees.