Recent shifts in nonpartisan race ratings have positioned Democrat Christina Bohannan as the clear favorite in Iowa’s 1st Congressional District rematch against Republican incumbent Mariannette Miller-Meeks. Cook Political Report rates the contest a toss-up, while Sabato’s Crystal Ball and Inside Elections moved it to lean or tilt Democratic in September and early October 2026. These adjustments reflect broader midterm headwinds for the Republican Party, strong Democratic fundraising parity near $7 million each, and polling showing Bohannan competitive or ahead. Traders appear to weigh these factors heavily, assigning Bohannan an 86.5% implied probability ahead of the November 3 general election, with an independent candidate also on the ballot.