> The problem is that there's no constitutional amendment making an exception to the first amendment to limit or forbid contributions to campaigns.

Citizens United wasn’t about campaign contributions. It’s already illegal for corporations to donate to campaigns.

Citizens United was about whether a 501(c)(4) corporation—just like the ACLU or the NAACP—can be prosecuted for releasing a movie critical of a candidate. Justice Kennedy wasn’t analogizing money to speech—the case was whether the government could control political speech by controlling how a corporation used its money in publishing a movie.

Here is the ACLU’s take on a constitutional amendment: https://www.aclu.org/blog/free-speech/campaign-finance-refor...