Traders assign a 66.5% implied probability to Democrats gaining majorities in both the House and Senate in the 2026 midterms, reflecting consensus around recent polling averages in competitive districts and states. Factors such as incumbent retirement patterns, candidate fundraising totals, and voter sentiment on economic and border security issues have shaped this positioning ahead of November voting. The 27.5% chance of Republican Senate control paired with Democratic House retention accounts for historical midterm dynamics favoring the opposition party and potential turnout advantages in specific battlegrounds. Lower probabilities for a Republican sweep or the reverse split underscore structural barriers, including Senate map composition and redistricting effects. Early voting data and final campaign events in the coming weeks remain key variables that could shift these assessments before resolution.