Poll: Iowa Voters Split on Democratic Presidential Candidates

Democratic presidential hopefuls (from L) California Senator Kamala Harris, Vermont Senator Bernie Sanders, former Vice President Joe Biden and Massachusetts Senator Elizabeth Warren take part in the fourth Democratic primary debate of the 2020 presidential campaign season co-hosted by The New York Times and CNN at Otterbein University in Westerville, Ohio on Oct. 15, 2019. SAUL LOEB/AFP via Getty Images

Iowa voters appear split on the 2020 Democratic presidential primary, revealing that four candidates are within the margin of error.

Former Vice President Joe Biden and Sen. Bernie Sanders (I-Vt.) are leading the primary field in Iowa, which is the first caucus state. They have 22 percent support apiece, respectively, said a CBS/YouGov poll released Sunday.