|Aggregate skewed to the left, largely due poll from highly untrustworthy source Quinnipiac;<ref>[https://www.realclearpolitics.com/epolls/2020/senate/ia/iowa_senate_ernst_vs_greenfield-7072.html Iowa Senate - Ernst vs. Greenfield]</ref> [[Iowa]] polling tends to overestimate Democrats, as occurred in the [[2018 Midterms]] with the state's gubernatorial election. | |Aggregate skewed to the left, largely due poll from highly untrustworthy source Quinnipiac;<ref>[https://www.realclearpolitics.com/epolls/2020/senate/ia/iowa_senate_ernst_vs_greenfield-7072.html Iowa Senate - Ernst vs. Greenfield]</ref> [[Iowa]] polling tends to overestimate Democrats, as occurred in the [[2018 Midterms]] with the state's gubernatorial election. |