Ald. Ricardo Muñoz (22nd) said Wednesday he plans to challenge Dorothy Brown for her seat as the Clerk of the Circuit Court of Cook County.
Muñoz's intentions were first reported by the Chicago News Cooperative, which quoted the Mexico-born alderman as stating the office needs reform. A published report said Brown's office often loses court files or takes too long to produce them.
Brown, first elected to the office in 2000, said she intends to seek a fourth term.
"The incumbent has been there for 10, 11 years and has not brought the office into the 21st century," he said, according to the CNC.
Muñoz, one of the city's most independent aldermen, was critical of Mayor Rahm Emanuel before his landslide victory in February. Muñoz endorsed former City Clerk Miguel del Valle in his campaign.
Attempts on Wednesday evening to reach Muñoz's office for comment were unsuccessful.