Illinois 2026 primary night: crowded races, incumbents lead as polls close

CBS News’ live Illinois primary coverage shows a crowded field across House seats and the Senate race, with Chad Koppie projected the winner in the 7th District GOP primary, Sean Casten winning the 6th District Democratic primary, Donna Miller leading the 2nd District Democratic race, and Mike Quigley projected to win the 5th District Democratic primary while Tommy Hanson is projected to win the GOP in that district. The 9th District is led early by Daniel Biss in a large Democratic field, Toni Preckwinkle holds a strong lead for Cook County Board President, and the Senate contest to replace Dick Durbin remains competitive among Juliana Stratton, Raja Krishnamoorthi, and Robin Kelly as turnout remains high in Chicago and statewide after polls closed.