The latest New York Times/Siena College poll shows President Trump struggling in a state he won comfortably in 2016 and Senator Joni Ernst facing a tough re-election challenge.
Joe Biden leads Donald Trump in Iowa, 46 to 43 percent, according to a new Times/Siena poll.
Joni Ernst leads Theresa Greenfield by 1 in the race for U.S. Senate, 45 to 44 percent.
Trump approval at 46/50