Former Maryland Gov. Martin O'Malley took a swipe at likely 2016 contenders Hillary Rodham Clinton and Jeb Bush on Sunday, saying the U.S. presidency "is not some crown to be passed between two families." Appearing on ABC's

This Week

, O'Malley, who is weighing whether to challenge Clinton for the Democratic nomination, called the presidency a "sacred trust to be earned and exercised on behalf of the American people."

He declined to say whether he thought the former secretary of state could stand up to Wall Street and other special interests. "I don't know where she stands," he said. "Will she represent a break with the failed policies of the past? Well, I don't know."

O'Malley is trying to position himself as a more liberal alternative to Clinton. - Washington Post