The Michigan 4th District race stands as one of the tightest 2026 House contests five days before the November 3 election, with recent polling showing Sean McCann within a few points of incumbent Bill Huizenga in a seat that leaned Republican by double digits in prior cycles. McCann, a state senator, has narrowed the historical gap through strong fundraising, endorsements from Michigan Democratic leaders, and emphasis on cost-of-living and energy issues, while outside groups have poured millions into both sides. Huizenga benefits from incumbency and established donor networks but faces a more competitive environment amid national midterm dynamics. Trader consensus on Polymarket reflects this toss-up character by assigning McCann a modest edge, consistent with the race's shift from safe Republican territory.