Iowa has four congressional districts, of which three are held by Republicans. Three of the four districts look to be competitive in 2018. Closely-contested battles here are not uncommon. Iowa has one of the most impartial processes in the nation for setting district borders. A non-partisan advisory commission is "not allowed to consider previous election results, voter registration, or even the addresses of incumbent members of Congress. No politician…is allowed to weigh in, or get a sneak preview."
To create your own forecast for the midterms, visit the 2018 House Interactive Map.
(a)Source: Ballotpedia (for margins). The margin is the percentage difference between the top two vote-getters in 2016.
More recent results (i.e., special elections held in 2017-18 for vacancies) are not displayed. * Race was uncontested | ^Top two vote-getters were from the same party
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