The billionaire Koch brothers' political giving is much more expansive than has previously been known.

Just weeks after the first subpoenas were issued in the WI John Doe probe in October 2013, senate Republicans had begun working to change state law to legalize the activities under investigation.

On June 10, a majority of the Senate Judiciary Committee voted to approve SJR 19, a constitutional amendment to restore the authority of Congress and states to regulate money in elections.