HEADS UP:
Montana has sorted this out, and if it works, any other state can do the same to _un-do_ the damage of Citizens United
In short, states may grant legal benefits and licenses to business entities, and in exchange they prevent business entities from acting as people.
(pls spread the word)

Transparent Election Initiative
A bipartisan team of former Montana officials have unveiled an oddly simple yet startlingly robust legal mechanism for undoing Citizens United that ...
15 years ago the Supreme Court decided corporations are people under the First Amendment.
Today, sold-out politicians block progress on all fronts to appease their corporate donors.
Citizens United is among the worst decisions in history. It corrupts our system every day.