The U.S. Chamber of Commerce.

Not something you hear a lot about:

The U.S. Chamber is a massive wrecking ball, bringing destruction to our democracy through its multipronged efforts of lobbying, secret money campaign finance spending. It and other groups representing massive corporate and billionaire funds have caused tremendous damage to our democracy.

The membership of the Chamber is a closely guarded secret if memory serves me. This article explains why.

"Fed Up With the U.S. Chamber of Commerce’s Anti-Democracy Activities? So is an Ambitious New Coalition." By Craig Sandler, Chamber Watch, 11/13/18.