The Kochs have been activists since the 1970s. You can go back and look at the platform of the Libertarian Party in 1980 and see what they really believe in. They wanted to abolish huge swaths of the U.S. government, including the Internal Revenue Service. They want to get rid of Social Security. They'd like to get rid of Medicare. They'd like to abolish the Environmental Protection Agency, which directly affects their business.

The book that I wrote is called Dark Money, and it's about secret spending that is very hard to follow. [George] Soros's whole thing is about government transparency, so he spends very much in the open, and the same with [Tom] Steyer.

What these memos do is they make legal acts that were criminal prior to these memos.

The Kochs are very much involved in this election, not backing [Donald] Trump but backing everything down the ballot from him. They're pouring money into capturing the Senate and the House of Representatives, and state Houses across the country.

So in a strange way, even though Trump is a billionaire, what he's been saying is, "Everything's rigged, it's all corrupt and I'm not corrupt because I'm my own billionaire." Both [Donald] Trump and Bernie Sanders made a lot of hay by making that argument.

Let's face it, the subject of campaign finance is not always scintillating. But it's incredibly important.

People I've interviewed say they're terrified there may be boycotts of their [the Kochs] products, which include so many household items that everybody's familiar with, things like Stainmaster Carpet and Dixie Cups and Brawny paper towels and Lycra.