[dodobirdlord]

It did not, in the sense that it only clarified a constitutional issue. The crux is that while corporations are complex legal fictions, they are still ultimately property owned and managed by actual people with constitutional rights. Corporations inherit on incorporation the constitutional protections that the incorporators would have if they were acting directly. In the words used in the majority opinion of the court, "If the First Amendment has any force, it prohibits Congress from fining or jailing citizens, or associations of citizens, for simply engaging in political speech."