Griffin, meanwhile, has vowed to singlehandedly fund a GOP candidate, and Irvin could be the beneficiary. Griffin's estimated worth dwarfs even the super-rich Pritzker's: $26.3 billion, according to Forbes.

The 2022 skirmish would not represent the first nine-figure proxy battle between the two men. Griffin helped defeat a Pritzker-backed graduated income tax referendum in 2020 — in which both spent more than $50 million of their own money.