On the SpeechNow.org request for an advisory opinion, Commissioner Mason has dissented from the draft advisory opinion (that cannot be approved in any case because the FEC lacks a quorum). The dissent raises one of the most important unanswered questions surrounding the constitutionality of campaign finance laws: does Congress have the power to limit contributions to committees that make only independent expenditures?
See this statement from the Center for Competitive Politics. Bob Bauer says it is now up to the courts.