Kamala Harris is leading Trump in a new Iowa poll.Robert Gauthier/Los Angeles Times via Getty Images; Rebecca Noble/Getty ImagesA new poll showed Kamala Harris had a surprise 3-point lead over Trump in Iowa.Betting odds on Robinhood and Kalshi tightened following the news.Trump won Iowa easily in both the 2016 and 2020 elections.Vice President Kamala Harris' betting odds jumped overnight after a new poll showed she held a surprise lead over former President Donald Trump in Iowa — a state he won easily in both 2016 and 2020.A Des Moines Register/Mediacom poll by Selzer & Co.