[2] In January 2019, Harmon lost that title when Cullerton retired the President Pro Tempore leadership position.

In the State Senate, Harmon voted for a bill that allows government to charge citizens for Freedom of Information Act requests.

Additionally he helped pass legislation to eliminate two obsolete taxing districts-the Cook County Tuberculosis Sanitarium District and the Cicero Township Trustee of Schools saving taxpayers millions of dollars.

[11] In 2017, the Chicago Sun-Times reported on Harmon's dual role as legislator and as an attorney handling state clients.

[13] In 2019, another report by the Chicago Sun-Times highlighted the relationship between Harmon's firm and clout-heavy lobbyist Frank Cortese.

The Sun-Times revealed that Cortese set up a lobbying business "with the help of a clout-heavy law firm of Burke Burns & Pinelli, whose attorneys have donated heavily to Madigan’s campaigns over the years.

Among the partners at the firm: state Sen. Don Harmon, who is vying to replace the retiring Cullerton as Illinois Senate president.