CNNIowa Poll: First poll of likely caucusgoers finds Biden, Sanders, O'Rourke atop the fieldDec 15, 2018more_vert
Des Moines RegisterIowa Poll: Biden, Sanders top early look at possible Democratic hopefuls in 2020 caucusesDec 16, 2018Brianne PfannenstielBy Brianne Pfannenstielmore_vert
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