Martin O'Malley Former Maryland governor

Age: 652

Religion: Catholic

Base: Centrists

Résumé: Former Maryland governor, former Baltimore mayor, former Baltimore city councilor, former assistant U.S. Attorney for the District of Columbia

Education: B.A. Catholic University of America. J.D. University of Maryland.

Family: O'Malley is married to Katie Curran (1990) and they have four children. Curran is a district court judge in Baltimore. Her father is Maryland's attorney general. O'Malley's mother is a receptionists in the Capitol Hill office of Democratic Sen. Barbara Mikulski.

Claim to fame: O'Malley pushed for laws in Maryland legalizing same-sex marriage and giving illegal immigrants the right to pay reduced tuition rates at public universities. But he's best known for playing guitar and sung in a celtic band cammed 'O’Malley’s March.'

: O’Malley may struggle in the Democratic primary since he endorsed Hillary Clinton eight years ago. If he prevails, he will have to run far enough to her left to be an easy target for the GOP. He showed political weakness when his hand-picked successor lost the 2014 governor's race to a Republican. But most troubling is his link with Baltimore, whose 2016 race riots have made it a nuclear subject for politicians of all stripes.