See this A.P. report. Note the quote from Floyd Abrams, one of the plaintiffs’ attorneys in McConnell:

Floyd Abrams, a First Amendment lawyer who also challenged the McCain-Feingold law before the Supreme Court, said Wisconsin Right to Life will have a tough case to make.
“Obviously, the government would argue it’s already been decided,” said Abrams, who is not involved in this case. “But by focusing on a particular ad in a particular place, there’s at least a possibility that the courts might say that we didn’t really mean there were no cases in which the 30- and 60-day provision was immune from challenge.”