Many remain undecided in the Democratic presidential contest, with Sanders, Biden, Warren and Buttigieg topping polls
Caucus voting has begun across Iowa, with voters set to declare which Democratic presidential candidate they believe is best positioned to beat Donald Trump in November.
Hundreds of thousands of Iowans – many of them still undecided – gathered in gymnasiums, libraries and churches to participate in the Iowa caucuses, the first official nominating contest of the 2020 primary.
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