He joins 15 other candidates that have officially declared their candidacy -- Kamala Harris, Beto O'Rourke, Elizabeth Warren, Cory Booker, Pete Buttigieg, Jay Inslee, John Hickenlooper, Amy Klobuchar, Bernie Sanders, Kirsten Gillibrand, Julian Castro, John Delaney, Tulsi Gabbard, Andrew Yang, and Marianne Williamson. And that's without Joe Biden (who is expected to announce his candidacy soon).
Massam, the 44 year-old son of Jamaican immigrants, said, "The promise of America belongs to all of us. That's why I'm going to be running for president."