The amount of political contributions Illinois Gov. Bruce Rauner has donated to Republican campaigns in the past month has exceeded $15 million, according to a review by the Chicago Sun-Times.
That total includes $1 million Rauner and his wife contributed to Illinois Republican Comptroller Leslie Munger's campaign fund on Monday. It also includes donations Rauner made to his personal campaign account.
Overall, the comptroller's race between Munger and Democratic challenger Susana Mendoza has been the most expensive Illinois contest this election cycle.
A total of more than $12 million has been spent on the state comptroller's race, reports the Chicago Tribune.
Many political observers suggest the Munger v. Mendoza race is a proxy war between longtime Democratic House Speaker Michael Madigan and Rauner, the state's first Republican governor in over a decade.
Rauner appointed Munger to the comptroller post after the December 2014 death of Republican Comptroller Judy Baar Topinka.