Bruce Rauner

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Illinois Treasurer and Republican candidate for governor Dan Rutherford, announces his office is investigating allegations against him made by an employee he suspects was put up to it by rival gubernatorial candidate Bruce Rauner during a news conference Friday, Jan. 31, 2014, in Chicago. Rutherford stated that an employee has made "allegations of misconduct" against him and Rutherford refuses to release details, citing it as a personnel issue.(AP Photo/Charles Rex Arbogast)

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Illinois Treasurer and Republican candidate for governor Dan Rutherford, announces his office is investigating allegations against him made by an employee he suspects was put up to it by rival gubernatorial candidate Bruce Rauner during a news conference Friday, Jan. 31, 2014, in Chicago. Rutherford stated that an employee has made "allegations of misconduct" against him and Rutherford refuses to release details, citing it as a personnel issue.(AP Photo/Charles Rex Arbogast)

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Illinois Treasurer and Republican candidate for governor Dan Rutherford, departs a news conference after he announced his office was investigating allegations against him made by an employee he suspects was put up to it by rival gubernatorial candidate Bruce Rauner during a news conference Friday, Jan. 31, 2014, in Chicago. Rutherford stated that an employee has made "allegations of misconduct" against him and Rutherford refuses to release details, citing it as a personnel issue.(AP Photo/Charles Rex Arbogast)

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Illinois Treasurer and Republican candidate for governor Dan Rutherford, listens to General Counsel of the Illinois Treasurer's Office, Neil Olson, during a news conference where Rutherford announced his office is investigating allegations against him made by an employee he suspects was put up to it by rival gubernatorial candidate Bruce Rauner Friday, Jan. 31, 2014, in Chicago. Rutherford stated that an employee has made "allegations of misconduct" against him and Rutherford refuses to release details, citing it as a personnel issue.(AP Photo/Charles Rex Arbogast)

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Illinois Treasurer and Republican candidate for governor Dan Rutherford, announces his office is investigating allegations against him made by an employee he suspects was put up to it by rival gubernatorial candidate Bruce Rauner during a news conference Friday, Jan. 31, 2014, in Chicago. Rutherford stated that an employee has made "allegations of misconduct" against him and Rutherford refuses to release details, citing it as a personnel issue.(AP Photo/Charles Rex Arbogast)

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Illinois Treasurer and Republican candidate for governor Dan Rutherford, holds up a copy of gubernatorial candidate Bruce Rauner's recent campaign finance report after announcing his office is investigating allegations against him made by an employee he suspects was put up to it by Rauner during a news conference Friday, Jan. 31, 2014, in Chicago. Rutherford says the staffer is represented by a lawyer who worked for Rauner, citing an entry of payment to the attorney on the financial form, and he claims the attorney asked for $300,000 on the employee's behalf to "keep it under wraps." Rutherford stated that an employee has made "allegations of misconduct" against him and Rutherford refuses to release details, citing it as a personnel issue.(AP Photo/Charles Rex Arbogast)

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Illinois Treasurer and Republican candidate for governor Dan Rutherford, announces his office is investigating allegations against him made by an employee he suspects was put up to it by rival gubernatorial candidate Bruce Rauner during a news conference Friday, Jan. 31, 2014, in Chicago. Rutherford stated that an employee has made "allegations of misconduct" against him and Rutherford refuses to release details, citing it as a personnel issue.(AP Photo/Charles Rex Arbogast)

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FILE - In this Oct. 8, 2013 file photo, Illinois Republican gubernatorial candidate Bruce Rauner speaks at a news conference in Chicago. The minimum wage debate could be top issue on 2014 campaign trail. Evidence of that came this week as Rauner, a venture capitalist, backtracked from past comments saying he’d advocate cutting the rate. He emerged last week as as the Republican candidate most open to raising the minimum wage, telling The Associated Press he’d be comfortable with up to $10 an hour if either the national rate is raised or Illinois reforms workers compensation. (AP Photo/M. Spencer Green, File)