This is a well-considered analogy from Michael Kinsley, one I wish more people would consider when they cry foul when (some) corporations decide to spend money advancing their preferred ideas or candidates:
The analogy I like (as did the Supreme Court in its ruling) is to a newspaper. Suppose Citizens United were reversed and President Trump decided one day that he was sick of The New York Times. So he proposes a law setting a ceiling on the amount any individual or organization can spend putting out a newspaper. Constitutional? I hope not. But it’s hard to see the difference in principle between this and a law limiting the amount a corporation or union may spend promoting a political candidate.
I recently chatted with Kentucky Congressman John Yarmuth about his proposal to remove First Amendment protections for many public discussions of federal candidates. He wasn’t particularly convincing in presenting an argument on behalf of an amendment that would strip away the constitutional protections for media outlets to discuss candidates openly while simultaneously asking that I trust Congress to delicately reanimate the corpse of the McCain-Feingold campaign finance rules prohibiting corporations (but not Trusted Media Outlets) from having their say. I have a hard time thinking that Congress, given the opportunity, would craft a proper balance between the interests of Democratic Government and the rights of individuals to band together and say whatever they think needs to be heard.