Washington (CNN) Former Maryland Gov. Martin O'Malley took a major shot at Hillary Clinton on Sunday, saying the country needs a "new perspective" and "new leadership" in the 2016 election.

"Let's be honest here," O'Malley said. "The presidency of the United States is not some crown to be passed between two families."

The Democrat's comments, in an appearance on ABC's "This Week," are another signal that he's likely to challenge Clinton in the 2016 Democratic presidential primary.

He's focusing in recent weeks on issues like income inequality and wage stagnation -- which liberal darling Massachusetts Sen. Elizabeth Warren has made her signature, but that haven't found a champion in the presidential race.

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