DES MOINES, Iowa - The latest Des Moines Register/Mediacom Iowa Poll shows a continued tight race between Senator Joni Ernst and Democratic challenger Theresa Greenfield.
The survey shows Greenfield leading 45% to 42% among likely voters, which is less than the poll's margin of error of 3.8 percentage points.
Another 3% say they would vote for someone else, 2% say they wouldn't vote in the race and 7% are unsure.
The Register reports the new poll is "largely unchanged" since June, when Greenfield led Ernst by 46% to 43%.
The poll of 658 likely voters was conducted from September 14th through 17th.
The survey also shows a competitive race in all four U.S. House races, with likely voters favoring a Democrat in the 1st, 2nd and 3rd Districts, and a Republican in the 4th District.