Sanders leads with Warren close behind in new Iowa poll

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Twenty four days at the caucus is a brand new poll in Iowa puts Bernie Sanders ahead of the democratic field was with Warren second Pete booze as third Joe Biden fourth it's a tight race CBS news political correspondent ed o'keefe has a preview of Tuesday's debate there will be six candidates on stage at this point that tonight's the end of the qualification period Joe biting people to judge Bernie Sanders Elizabeth Warren Amy club which are and Tom Stiers another multi billionaire who's been spending his own fortune on television and all across the country to surveys out last night in South Carolina and Nevada given the numbers he needed to make it proof that TV advertising at least when it comes to campaigns still

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