July 24, 2014 at 1:00 am

Huge-money brawl shaping up for Illinois governor's seat

Chicagoó Democratic Gov. Pat Quinn and Republican Bruce Rauner are setting up a big-money battle for Illinois governor, hauling in millions for a highly competitive race one campaign finance expert predicts could see more than double the spending of four years ago.

Quinn, who is seeking a second full term, raised about $3.7 million in the three-month period that ended June 30, according to second-quarter campaign finance filings, and has about $12 million in his campaign fund. His biggest donors were labor unions and the Democratic Governors Association, though Quinn said in a statement more than two-thirds of his donors gave less than $100.

Rauner raised double the amount of Quinn in the same quarter but spent millions more, leaving him with about $3.5 million. But the multimillionaire ó who already has given more than $6 million to his own campaign ó has the personal wealth and fundraising network to easily make up the difference with Quinn.

His totals include a $2.5 million donation from Chicago hedge fund CEO Ken Griffin. The money, given last month, is believed to be the largest single Illinois campaign contribution in the post-Watergate era, and brings Griffinís total donations to Raunerís campaign to more than $3.5 million.

The Winnetka businessmanís campaign also said via Twitter that 80 percent of its more than 8,000 donations were for $100 or less.

The spending is a sign of how competitive the race is and how badly Republicans would like to take control of a blue state thatís also home to President Barack Obama. The Republican Governors Association has called Illinois one of its top 2014 targets, and already has sunk $1.5 million into the race.

Rauner, who defeated three candidates to win the GOP primary, has already been spending heavily on TV advertising and other areas. Quinn has benefited from not having a costly Democratic primary and from the name recognition that comes from incumbency and decades of political activity.