The NY-21 contest between Democrat Blake Gendebien and Republican Anthony Constantino remains highly competitive ahead of the November 3 general election, with recent polls showing results within the margin of error and no consistent leader. The open seat created by Elise Stefanik's retirement has produced divided primary outcomes and mixed survey trends, including Siena and Public Policy Polling results that alternate narrow edges. Republican registration advantages in the North Country district are offset by Democratic messaging on costs and turnout efforts, keeping implied probabilities for decisive margins low. Traders reflect this balance through pricing that favors outcomes under 6 points while assigning limited weight to larger spreads, with final weekend developments in voter mobilization likely to determine separation.