Incumbent Democrat Laura Gillen holds a modest edge in New York’s 4th congressional district, a Nassau County swing seat with a Cook Partisan Voter Index of D+2 that has flipped between parties in recent cycles. Gillen, who defeated the prior Republican incumbent by roughly two points in 2024, faces Republican nominee Jeanine Driscoll following June primaries that left both candidates unopposed or decisively nominated. Trader consensus on margins clusters around double-digit Democratic victories, reflecting the district’s narrow partisan balance, Gillen’s incumbency and fundraising advantages, and limited recent polling shifts. The race remains competitive due to suburban voter volatility and national midterm dynamics, with outcomes sensitive to turnout among swing voters and any late-cycle campaign developments before the November 3 general election.