It’s best summarized by Timothy Lee.
“So I’m not thrilled at the idea of Fortune 500 companies spending a ton of money on bogus “issue ads.” But I think the dangers of such ads are frequently exaggerated. I’m far more worried about preserving the right of organizations like the ACLU to spread their message. And I don’t see any plausible way to stop the former without seriously restricting the latter. So I’m glad to see the Supreme Court take the words of the First Amendment — “Congress shall make no law” — literally.”
This ruling doesn’t change the rules about corporate contributions to campaigns, it only addresses the ability of corporations to run political ads within a certain amount of time before an election. “But corporations aren’t people! They shouldn’t hav the same rights as a person.” No, but they are a group of people. I find it odd that so many people support our right to free speech and our right to assemble but oppose our right to free speech when we assemble (HT Warren Meyer).