This cycle, all 100 of the seats in the Iowa House of Representatives are up for election, and Republicans currently control the chamber by a margin of 20 seats.
The Iowa House is currently under Republican control are considered generally likely to remain as such, but it is still a competitive cycle.
The state has operated under a Republican trifecta for the past 5 years.
Polls close in the state at 8 p.m. local time, or 9 p.m. EST.