Mitch McConnell, as much as anyone, has a right to feel vindicated today. It was the case he brought against McCain-Feingold, which he lost then, that now has been reconsidered so that his position mostly won:

McConnell Statement on Citizens United 

WASHINGTON, D.C. – U.S. Senate Republican Leader Mitch McConnell made the following statement Thursday regarding the Supreme Court’s ruling on the Citizens United case:

“For too long, some in this country have been deprived of full participation in the political process. With today’s monumental decision, the Supreme Court took an important step in the direction of restoring the First Amendment rights of these groups by ruling that the Constitution protects their right to express themselves about political candidates and issues up until Election Day. By previously denying this right, the government was picking winners and losers. Our democracy depends upon free speech, not just for some but for all.”