Monmouth University: “Among all registered voters in Iowa, Donald Trump is supported by 48% and Joe Biden is supported by 45%. Another 3% say they will vote for Libertarian Jo Jorgensen and 3% are undecided. These results include 38% who are certain to vote for Trump and 36% who say the same for Biden.”
“At the other end of the spectrum, 45% say they are not at all likely to vote for the incumbent and 46% say the same for challenger. Biden has a small edge in 13 counties where the vote margins were closest in the 2016 presidential election. The Democrat currently holds a 52% to 45% lead among registered voters in these swing counties* which Hillary Clinton took by a combined one-point margin. The poll also finds that Biden racks up a large margin (62% to 31%) in three counties – including the state’s largest, Polk – that as a group went for Clinton by 17 points in 2016. Trump has a sizable lead (59% to 34%) in the counties he won by a combined 30 points four years ago.”