there are some that seem to have no purpose other than to allow dark money to flood into the political system. >> they sometimes are spending tens of millions of dollars, but they have no bricks and mortar. they operate out of p.o. box. these are the trademark qualities of a political community. >> what is the difference between what you're describing and money laundering? >> not a whole heck of a lot. we have tracked these money flows going through these very complex networks to in part erase the footprint. >> as if this isn't bad enough, these groups can can donate their money to anyone they want, including a super pac and still keep the original donors secret. >> how can we be assured that it is even domestic. >> what you are describing are all things that are threatening our democracy. >> a donation is not a bad thing. it is a perfectly legitimate way