The open-seat race in New York’s 21st Congressional District favors Republican nominee Anthony Constantino in trader pricing due to the district’s consistent Republican tilt, including a 5.5-point Trump margin in 2024 and an 81,000-voter GOP enrollment advantage. Constantino, who won the June primary with substantial self-funding exceeding $9 million, benefits from these fundamentals and alignment with the national Republican environment, even as recent Siena polling from early October shows Democrat Blake Gendebien leading 46-42 among likely voters. Election ratings from Cook and others classify the contest as Likely Republican, underscoring structural barriers for Gendebien despite issue-based polling advantages on affordability and healthcare. With the November 3 general election three weeks away, traders appear to weigh the district’s partisan baseline and resource disparities more heavily than short-term survey shifts.