Lauren Underwood secured re-election in Illinois’s 14th congressional district on November 3, 2026, with 62.6 percent of the vote to Republican James Marter’s 37.4 percent, producing a 25.2-point margin. This outcome aligned closely with the market’s highest-priced bin of a 25-30 point Democratic victory. The result expanded on Underwood’s prior 10-point margin in 2024 amid stable district lines and limited campaign spending by the challenger. Vote tabulation across key counties such as Kane and Kendall showed consistent Democratic performance without late swings that would have altered the final spread. Traders priced the narrow 25-30 range highest because preliminary counts quickly converged on that interval, while wider or narrower bins retained only residual probability pending full certification. No outstanding ballots or recounts have emerged to shift the consensus range.