A small note: yesterday I guessed that Rick Santorum had been outspent in Illinois by the combined forces of the Romney campaign and Mitt’s Super-PAC Restore Our Future by a 10-1 margin.

Turns out it was only 7-1, per Politico‘s Alexander Burns, citing a GOP media-buying source:

Romney’s campaign has spent $1,117,704 million in Illinois while the super PAC Restore Our Future has put in $2.556,353 million.

The Santorum campaign spent a comparatively modest $219,961 and the super PAC backing Santorum, the Red White and Blue Fund, put in $312,150.

The gulf was even more enormous in the crucial, expensive Chicago media market. There, Romney’s campaign spent $710,158 and his super PAC spent $1,367,125. The only pro-Santorum spending was $97,119 from the campaign, the same source said.

That amounts to a spending disparity of 21 to 1 in Romney’s favor.

If these sort of details matter to you, it might be interesting to look at some of the exurban counties in the metro Chicago area tonight, like Kendall County, where Santorum theoretically ought to have some appeal but where voters will have absorbed much of the Romney media beatdown.

Ed Kilgore

Ed Kilgore is a political columnist for New York and managing editor at the Democratic Strategist website. He was a contributing writer at the Washington Monthly from January 2012 until November 2015, and was the principal contributor to the Political Animal blog.