The Bernie Sanders 'Revolution:' Will Democrats Buy In?

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Once again, Hillary Clinton is facing an unexpected challenge in the Iowa caucuses… with less than two weeks to go. We hear how last night's debate with Bernie Sanders might effect the outcome -- in Iowa and other states as a long primary process finally gets under way.

Later on the show, as the Australian Open gets under way, the BBC and BuzzFeed claim gambling syndicates have been fixing matches with some top tennis players involved. 

Photo: Screen grab from Democratic debate on NBC News, January 17, 2016.