The Wisconsin 3rd congressional district remains one of the nation's tightest House races heading into the November 3 general election, with traders pricing the contest between incumbent Republican Derrick Van Orden and Democratic challenger Rebecca Cooke at even odds. This balance stems from the district's swing character, a 2024 rematch decided by under three points, and recent polling averages hovering near the margin of error amid strong fundraising from both sides. High outside spending, turnout dynamics in rural and suburban areas, and national midterm conditions continue to limit separation. Late October developments such as additional ad buys, voter mobilization efforts, or shifts in economic sentiment could widen the final margin and move the various percentage buckets priced on Polymarket.