Biden the 'clear front runner' among Democratic contenders: FiveThirtyEight's Nate Silver

FiveThirtyEight Founder and Editor-In-Chief Nate Silver said former Vice President Joe Biden is a "clear front-runner" among the slew of Democrats vying for the party's nomination.

"Probably about half the time throughout history, the candidate leading the polls now goes on to win his or her primary," Silver told Powerhouse Politics podcast hosts, ABC News' Chief White House Correspondent Jonathan Karl and Political Director Rick Klein.

Karl questioned the weight polls hold this early in the race, and Silver noted that Biden's numbers will probably fade in a few weeks after this "post-bounce period."

But Silver also pointed out that, "given that primaries typically consist of -- maybe not 20 candidates like we have now -- but usually consist of 10 or 12 candidates, is somewhat impressive, actually."