I would not doubt that. Corporations have been legal persons since the XIVth Amend got interpreted in several court cases, and now can own private property and can privately donate to political campaigns. CFR is oriented to controlling these legal persons. This is 99% of the reason CFR exists: the Unions are also Corporations—formerly a hugh issue and still not entirely quiet.
It's still a "free speech" issue. McCain and Feingold may have "intended" to rein in corporate donations, but if that was their intention, they threw out the baby with the bath water.
The ONLY acceptable limitation to money spent on campaigns should be "full disclosure". Publish who made the donations and to whom, with info available to anyone who asks, with internet, snail mail, or any other means of asking.