Exclusive: Brandon Johnson's election petitions may be challenged by mayoral rival

NBC 5 Chicago Political Reporter Mary Ann Ahern has learned Chicago Mayor Brandon Johnson’s petitions could be challenged by at least one mayoral rival. Johnson, who filed the petitions earlier this week as he made his run for reelection official, could face scrutiny for at least some of the signatures he submitted to the Chicago Board of Elections. Ahern has learned this week that at least one fellow mayoral candidate could file a challenge to have Johnson thrown off the ballot, and it would mark the first time a sitting mayor would have to go through the board’s hearing process for such challenges. In order to run for mayor, a candidate must submit 12,500 valid signatures, according to Chicago law. In order for a signature to be counted as valid, it must come not only from a registered voter, but it can also be the only petition that voter has signed in the nominating period. Johnson filed more than 33,000 petition signatures, but there are numerous questions around t