Daniel Biss secured the Democratic nomination for Illinois’s 9th Congressional District after winning a crowded March 2026 primary to succeed retiring Representative Jan Schakowsky, while John Elleson prevailed in the Republican primary. The district, encompassing northern Chicago suburbs including Evanston and Skokie, has consistently favored Democratic candidates by wide margins and carries solid-Democratic ratings from multiple forecasters. Trader consensus at 94.5 percent for Biss reflects this structural advantage, the absence of major recent developments that would narrow the gap, and limited Republican infrastructure in the area. A scheduled September 24 candidate forum offers one remaining platform for direct comparison before the November 3 general election, though late developments such as unexpected national shifts or candidate-specific issues would need to emerge to alter the current implied probability.