Did "Untrace-able" $1.5 Million Donation to Corbett Violate PA. Campaign Finance Laws?

http://www.publicintegrity.org/2012/10/18/11498/pennsylvania-governor-benefited-untraceable-15-million-donation

Excerpts:

"Funding system called an elaborate, legal 'money-laundering scheme'

... in his 2010 bid for governor ....a $1.5 million contribution arrived from — Wisconsin? Officially, the donation was from the Wisconsin affiliate of a D.C.-based political organization called the Republican Governors Association. The $1.5 million could not travel directly from the RGA to Corbett. Pennsylvania law bans candidates from accepting corporate money and the RGA accepts millions of dollars from some of the nation’s largest businesses.

...In a single day, the $1.5 million gift traveled from the D.C.-based parent organization to the RGA Wisconsin PAC, to the RGA Pennsylvania PAC and finally to Corbett’s campaign account.
By the time the donation reached Corbett, it was impossible to identify the original source of the cash or whether the donation was permissible under state law.

The RGA’s funding played a central role in Corbett’s victory. By Election Day he had received a total of $6 million from the RGA — 21 percent of his total fundraising, easily the top donor to the campaign, according to the National Institute on Money in State Politics."

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http://stateimpact.npr.org/pennsylvania/2012/10/18/mystery-money-flowed-to-corbett-campaign/