(AP Photo/John Locher)
(AP Photo/John Locher)

In the first Democratic debate hosted by CNN on Westwood One News, front-runner Hillary Clinton worked to solidify her lead, Bernie Sanders sought to widen his appeal and 3 other challengers introduced themselves to the American public.

FOX News Radio's Jon Decker reports from Las Vegas:

Clinton defended her reset with Russia, her vote to authorize war in Iraq and her recent flip-flop on the just-concluded Trans Pacific Partnership trade deal.

(Clinton) "Everybody on this stage has changed a position or two. We've been around a cumulative quite some period of time."

Clinton sought to move on from the email controversy that has led to a steady decline in her approval ratings. And she got a helping hand from Vermont Senator Bernie Sanders.

(Sanders) "The Secretary is right. And that it that the American people are sick and tired of hearing about your damn emails."

Former Maryland Governor Martin O'Malley enjoyed many applause lines. But Jim Webb and Lincoln Chafee were largely irrelevant.

Five more Democratic debates remain. The big unknown is whether Vice President Biden will be a part of them.

In Las Vegas, Jon Decker, FOX News Radio.

WATCH for more on the Democratic debate:

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