The New Yorker offers a detailed behind the scenes look of the final decision of Citizens United. In this article, Jeffrey Toobin credits Chief Justice John Roberts with the way the Court analyzed and ruled on the case:
Citizens United is a distinctive product of the Roberts Court. The decision followed a lengthy and bitter behind-the-scenes struggle among the Justices that produced both secret unpublished opinions and a rare reargument of a case. The case, too, reflects the aggressive conservative judicial activism of the Roberts Court. It was once liberals who were associated with using the courts to overturn the work of the democratically elected branches of government, but the current Court has matched contempt for Congress with a disdain for many of the Court’s own precedents. When the Court announced its final ruling on Citizens United, on January 21, 2010, the vote was five to four and the majority opinion was written by Anthony Kennedy. Above all, though, the result represented a triumph for Chief Justice Roberts. Even without writing the opinion, Roberts, more than anyone, shaped what the Court did. As American politics assumes its new form in the post-Citizens United era, the credit or the blame goes mostly to him.