Charles and David Koch, the billionaire owners of of Koch Industries, are known as big spenders when it comes to lobbying and influencing public policy. Now, a new document filed with the IRS reveals how the Koch political machine funneled over $54.5 million in previously undisclosed funds to a litany of front groups designed to smear Democrats.

The disclosure suggests that a very wide variety of Republican groups active in the last major election, from pro-life organizations that ran ads on abortion to shadowy fronts that aired partisan commercials with the infamous Ground Zero Mosque conspiracy, have been highly dependent on Koch money. The document also reveals that the Koch’s political network spent much more on electing the current Congress than previously known.