Screamin' Dean (AP Photo/Paul Sancya)
Screamin' Dean in 2004. (AP Photo/Paul Sancya)

Former Vermont governor Howard Dean, who in 2004 lost his bid to become the Democratic presidential nominee, says he'll consider another run for president in 2016.

Dean -- an outspoken liberal -- told CNN's Peter Hamby that he will run if other candidates aren't addressing the issues that are important to him.

"I am not driven by my own ambition," Dean said. "What I am driven by is pushing the country in a direction that it desperately needs to be pushed, pushing other politicians who aren't quite as frank as I am who need to be more candid with the American people about what needs to happen. I am not trying to hedge. It's a hard job running. It's really tough. I am doing a lot of things I really enjoy. But you should never say never in this business."

Dean was leading in the polls heading into the Iowa caucuses in 2004 but wound up finishing a disappointing distant third. (Then-Sen. John Kerry of Massachusetts eventually won the nomination, then lost the general election to President George W. Bush.)

At Dean's campaign rally that night in Iowa, he tried to reassure supporters with an energetic speech that will forever be remembered for his "Dean Scream."