Illinois gubernatorial candidates Bruce Rauner and J.B. Pritzker will square off in the November general election after clinching their party’s respective nominations Tuesday night. Pritzker easily took the Democratic field, defeating his closest competitors by a 20-point margin. As the incumbent, Governor Rauner, narrowly fended off a challenge from his political right by State Representative Jeanne Ives. Rauner took 51.6 percent of the vote, while Ives had 48.4 percent, making it far tighter than pollsters had originally predicted. The Governor performed well in Cook County, while Ives picked up support in the counties outside Chicago and in rural regions.

However, Rauner’s primary performance could spell trouble. Illinois has a strong base of Democratic support, and a low-recognition candidate like Ives demonstrates the Governor’s political vulnerability.

Pritzker, who faced allegation surrounding his offshore banking accounts, as well as private FBI tapes, had outperformed expectations. With the support of powerful Illinois House Speaker Michael Madigan, and an energized Democratic base, Pritzker sailed to victory with 45 percent of the vote among five other candidates. State Senator Daniel Biss captured around 27 percent, while Chris Kennedy had 24 percent.

Rauner versus Pritzker, a multimillionaire and a billionaire, respectively, has the ability to become the most expensive gubernatorial race in American history. They have already flooded the Land of Lincoln with a combined $150 million in campaign cash, less than seven months before the general election (the record was set in 2010, when Democrat Jerry Brown defeated Republican Meg Whitman after they raised a combined $280 million to run for Governor of California).