Dr. Ben Carson is the former head of pediatric neurosurgery at Johns Hopkins University in Baltimore, Maryland.
The Republican governor of New Jersey also wants to be president.
Ted Cruz is a senator from Texas.
Carly Fiorina is the only Republican woman so far running for president.
Lindsey Graham is a Republican senator from South Carolina and a military veteran.
Mike Huckabee is an ordained preacher and a musician who plays bass.
Bernie Sanders is a U.S. senator from Vermont.
Lincoln Chafee is a former senator and governor of the small state of Rhode Island.
The 2016 election is Hillary Clinton’s second run for the White House.
Martin O’Malley is a former governor of the state of Maryland and a former mayor of Baltimore, a city in Maryland.