Arizona's nine congressional districts position Democrats with three safe or solid seats in forecasts from outlets such as the Cook Political Report, while open AZ-1 and AZ-6 rate as the main toss-ups that could shift the total. Recent July 2026 primaries clarified nominees across these battlegrounds without major disruptions, leaving outcomes sensitive to candidate quality, fundraising edges, and turnout in Phoenix-area and southern districts. National midterm dynamics and voter registration patterns further shape expectations, with traders assigning the highest probability to five Democratic seats as the most likely result of one or two flips in the competitive races. Lower odds on four or six seats reflect the narrow margins typical in these districts, while probabilities below three or above seven remain minimal given structural baselines and limited structural advantages outside the toss-ups.