Biden, Warren and Buttigieg locked in three-way race in Iowa

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Iowa is up for grabs. At least according to the new Suffolk University-USA Today poll, finding South Bend Mayor Pete Buttigieg on the rise after last week's Democratic debate, and within striking distance of both Joe Biden and Elizabeth Warren. Washington Post opinion writer Jonathan Capehart and former Vice President of Campaigns for the Center for American Progress Emily Tisch Sussman join Craig Melvin to discuss.