Emerson is, at the same time, one of the most Trump and most Sanders pollsters.
The USA Today poll from the same day has Sanders falling behind, 6 points less than Biden.
... and that is with very little Rogangate effect in there, as only one of the 4 days of polling was done after Sanders' campaign pissed off minorities.In the survey taken Thursday through Sunday, Biden was backed by 25% of likely Democratic caucusgoers, ahead of Vermont Sen. Bernie Sanders at 19%; former South Bend, Indiana, Mayor Pete Buttigieg at 18%; Massachusetts Sen. Elizabeth Warren at 13%; and Minnesota Sen. Amy Klobuchar at 6%.