Former Maryland Gov. Martin O’Malley speaks during an event to announce that he is entering the Democratic presidential race, on Saturday in Baltimore, as his wife, Katie, right, looks on.

O’Malley entered the Democratic presidential race on Saturday in a long-shot challenge to Hillary Rodham Clinton for the 2016 nomination, casting himself as a new generation leader who would rebuild the economy and reform Wall Street.

“I’m running for you,” he told a crowd of about 1,000 people in a populist message in Baltimore, where he served as mayor before two terms as governor. O’Malley said he was drawn into the campaign “to rebuild the truth of the American dream for all Americans.”