Famous names face off in historically expensive Illinois governor race

Over $100 million has been spent by both parties ahead of Tuesday's election.

In a high stakes and multi-million dollar gambit, a son of Robert F. Kennedy is taking on the heir to the Hyatt hotel fortune, and an incumbent governor is pouring millions of his own money into his effort to hold on to the top job in a blue state.

Incumbent Gov. Bruce Rauner has taken heat from both the left and right during his tenure, and despite pouring over $50 million of his own money into his re-election bid is facing an energetic primary challenge from conservative State Rep. Jeanne Ives.

Rauner has been hindered by a budget crisis during his first term, and last week vetoed a bill passed by the Democratic-controlled state legislature that would have required all gun dealers in the state to obtain a license, a move critics say was a way to sure up support with his Republican base ahead of Tuesday.

On the Democratic side, frontrunner J.B. Pritzker, whose family owns the Hyatt hotel chain, has dominated the fundraising race, and loaned his campaign an additional $6.3 million last week, bringing his total investment in the race thus far close to $70 million, according to campaign finance records.

If the current rate of spending holds, Illinois could break the current record for the most expensive gubernatorial race in American history, a title currently held by California's 2010 gubernatorial election, which saw roughly $280 million spent.

"It’s entirely possible that that could happen here, it just depends on who wins tomorrow, who the candidates are, and how much they’re willing to put in," Sarah Brune, the executive director of the Illinois Campaign for Political Reform, a non-partisan group that tracks political spending in the state, told ABC News.

"All in sum, all of the candidates for governor have raised about $160 million so far," Brune said, an impressive total considering the general election campaign is not even underway.

In an attempt to tie Pritzker to Blagojevich and weaken his political standing ahead of November, Rauner has run ads featuring a recording of the two men discussing who would fill the U.S. Senate seat once held by former President Barack Obama. Pritzker has denied any wrongdoing but last month called the calls “regrettable” when asked a news conference.

National Democrats have already sensed Rauner’s vulnerability, and see the competitive primary he is locked in as an indication that his seat is theirs for the taking.

Last week the DGA rolled out two television ads, one focusing on Rauner’s record on jobs and the budget and the other painting Ives as “too conservative” for Illinois in what is being interpreted nationally as an attempt to boost Ives and energize the state’s more conservative voters against Rauner.

Thompson said the DGA's attempts to boost Ives and hurt Rauner show that "they don't have faith in their own candidate."