President Donald Trump has a slight advantage over Democratic presidential candidates Sen. Elizabeth Warren, D-Mass., and former Vice President Joe Biden, but trails Sen. Bernie Sanders, I-Vt., by 2 percentage points in Iowa, according to an Emerson College poll.
Trump leads Warren and Biden 51% to 49%. Sanders, meanwhile, leads Trump 51% to 49%.
Among Democratic candidates, Biden is tied with Warren for the lead at 23%.
South Bend, Indiana, Mayor Pete Buttigieg is third at 16%, followed by Sanders in fourth at 13%.
"The good news for Biden is he did not lose much ground since March's poll that had him at 25% of the vote," Emerson Polling Director Spencer Kimball said. "It appears that Warren has been the beneficiary of Sanders' drop from 24% to 13%; Mayor Pete appears to have solidified his base in Iowa, going from 0% in February, to 11% in March, and now 16% in the Hawkeye state."
Emerson researchers surveyed 888 registered voters, including 317 Democratic caucusgoers, from Oct. 13-16.
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