Poll: Biden Drops Significantly, Sanders and Warren Tied in First With Former VP

(L)-Democratic presidential candidate Sen. Elizabeth Warren (D-Mass.) at the Iowa State Fair in Des Moines, Iowa on Aug. 10, 2019. (Photo by Sergio Flores/Getty Images) (R)-Democratic presidential candidate and former Vice President Joe Biden at the Iowa Events Center in Des Moines, Iowa on Aug. 10, 2019. Photo by Stephen Maturen/Getty Images

A new poll shows the three Democratic 2020 frontrunners—former Vice President Joe Biden and Sens. Bernie Sanders (D-Vt.) and Elizabeth Warren (D-Mass.)—tied for first, with a significant drop for Biden.

Monmouth University conducted the survey by telephone from Aug. 16 to Aug. 20. Eight hundred adults answered the call, but the Democratic results reflect only 298 registered voters who said they are Democrats or leaning toward the Democratic Party. Because of the small sample size, the survey has a margin of error span of 5.7 percent.