**Christina Bohannan leads the IA-01 House market at 82% because the 2026 midterm environment and the district’s narrow recent history favor the Democratic challenger over incumbent Republican Mariannette Miller-Meeks.** The seat, rated a toss-up or lean Democratic by multiple forecasters, flipped to a rematch after Miller-Meeks won by fewer than 800 votes in 2024 following larger margins in prior cycles. National conditions—including elevated consumer prices, tariffs, and public reaction to the Iran conflict—have weighed on Republican positioning in this R+4 PVI district. Bohannan and aligned groups have aired ads targeting crossover voters on economic and health-care costs, while both candidates maintain comparable fundraising. An October 20 debate offers a late-cycle opportunity to shift momentum before November 3 voting. Traders price these structural and campaign factors as giving Bohannan the clearer path to victory.