Billionaire businessman J.B. Pritzker has taken the first formal step toward a 2018 challenge to Illinois Republican Gov. Bruce Rauner.
The Democrat says he filed paperwork with the Illinois State Board of Elections on Tuesday to form an exploratory committee. He says he's contributing $200,000 to cover the committee's day-to-day operations.
Pritzker is an investor and philanthropist who has the personal fortune to compete with Rauner's wealth.