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Former Secretary of State Hillary ClintonHillary Rodham ClintonHannity: I won't discuss Seth Rich story for now "out of respect for the family" Clinton slams Trump's budget: 'An unimaginable level of cruelty' Trump’s crisis of legitimacy MORE is largely seen as the prohibitive favorite for the party's nomination if she runs. Other lawmakers, including Vice President Biden, Maryland Gov. Martin O'Malley, Sen. Kirsten GillibrandKirsten GillibrandDem senator: 'One of our closest allies' expressed concern about intelligence sharing Intel chief quiet on whether Trump asked him to deny Russia evidence Gillibrand on Trump: 'We should look into obstruction of justice' MORE (D-N.Y.), and New York Gov. Andrew Cuomo (D), are also perceived as possible 2016 candidates.

Dean told the network that Clinton would not have "a pass" if she decided to run, despite early polls showing her with substantial leads over other Democrats.

"There will be other people who will run," Dean said.

But Dean, whose 2004 presidential campaign derailed after a disappointing third-place finish in the Iowa caucuses his often-mocked yell, sometimes called the "Dean Scream", said he was leaning against a run at the moment.

"If you had to put a gun to my head and make me decide right now, I wouldn't," he said. "But who knows?"