Henyard filed a lawsuit after Illinois State Senator Napoleon Harris was nominated instead of her during a Democratic Party caucus last month.
READ MORE | Tiffany Henyard denied place on ballot to stay on as Thornton Township supervisor
Henyard claimed her supporters were not allowed into that meeting, tainting the results.
A judge has now thrown out the case. This means Henyard can only run for re-election through a write-in campaign.
SEE ALSO | Thornton Township Supervisor Tiffany Henyard opposes board's appointment of interim trustee