Iowa caucuses give Democratic candidates first test of voter appeal | Nightline "Nightline" spoke to voters as Democratic presidential hopefuls spent the last 72 hours making their final pitches across the state.

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#Nightline #IowaCaucus #Biden #Sanders #Buttigieg #Warren #Klobuchar #Yang #2020 #PresidentialCandidates #Politics #DemocraticCandidates

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