Billionaire businessman J.B. Pritzker announced Thursday that he is launching a campaign to try to unseat Illinois Republican Gov. Bruce Rauner, setting the stage for what could be one of the most expensive races of the 2018 election cycle.
 
Pritzker, an heir to his family's Hyatt Hotel chain and investor who Forbes estimates is worth $3.4 billion, has the ability to self-finance a campaign that is expected to shatter the more than $100 million spent by the wealthy venture capitalist Rauner and former Democratic governor Pat Quinn in the 2014 race.
 
Pritzker, who served as co-chairman of Hillary Clinton’s 2008 campaign for the White House, will join a crowded Democratic field seeking the nomination that includes businessman Chris Kennedy, the son of  late attorney general Robert F. Kennedy. Pritzker's sister, Penny, served as Commerce secretary in President Obama's administration. He also founded the Pritzker Group, a private investment firm, and the Chicago tech incubator 1871.
 
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