Two incumbents fall, appointees hold on in Cook County Board races
The contested races for the 17-member Cook County Board ended with two established incumbents toppled, three recent appointees surviving outside challenges, and several familiar political names edging out competitors.
The board is overwhelmingly Democratic — only one seat is currently represented by a Republican — so Tuesday’s winners are likely to succeed again in November. It’s a similar story for Cook County Board President Toni Preckwinkle, who has no current Republican challenger and trounced Democratic opponent Brendan Reilly in Tuesday’s primary. The Republican Party can still nominate candidates for vacant ballot spots before June.
Several seats were open, thanks to two voluntary exits and two board commissioners running for higher office.
Sixth District Commissioner Donna Miller was in the latter group, successfully snatching the Democratic nomination for Illinois’ 2nd Congressional District. Her County Board seat representing much of the Southland saw a crowded Democratic primary, with a familiar name winning out.
https://www.chicagotribune.com/2026/03/18/cook-county-board-election-primary-results/