Will Democrats win back the House majority in the November 2026 midterm elections?

The DDHQ model (July 15) gives Democrats a 61% structural probability of winning the House, projecting a 226-209 seat advantage [1], though they note redistricting has raised the GOP floor and lowered the Democratic ceiling [1]. Prediction markets are considerably more bullish: Polymarket prices Democrats at 86% with $9M traded [2], reflecting strong voter enthusiasm (Democrats hold a 10-point enthusiasm gap over Republicans) and Trump's 39% approval rating [3]. The main caution is that the generic ballot has narrowed meaningfully — from D+7 in May to roughly D+3.5 to D+5 by mid-July — and redistricting in Florida, Tennessee, Virginia, and Texas has structurally improved GOP prospects [1]. Balancing the conservative 61% structural model against strong market signals and historical midterm trends, a probability near 77% appropriately reflects Democratic favorability while acknowledging meaningful Republican headwinds.