Montana voted in laws to disclose donors because they really don’t like “Dark Money” in their politics. Every state should follow their example!

Kimberly Reed’s new project “Dark Money” pulls off what so many campaign reformers have trouble doing: She captures the personal impact of the flood of cash that has flowed into elections following the Supreme Court’s Citizens United decision.

So much focus on money in politics is on Senate and House races; “Dark Money,” which opens this weekend, looks at state lawmakers in Montana who found themselves driven from office by a flood of pre-election day attack ads. The sources were opaque groups, financed by out-of-state corporate money, often with the message that…