Jon Stewart and Stephen Colbert offered a helpful lesson in how Super PACs work Tuesday -- with help from a cardboard TV.
Stewart independently controls the Super PAC that supports Colbert in his run for president. But Colbert -- like Mitt Romney, Newt Gingrich, and countless others who say they have no control over their Super PACs -- can't directly coordinate with the head of his Super PAC about how its money should be spent.
Colbert can, however, go on TV to express his opinions about PAC ads -- as long as he doesn't speak to Stewart directly. He can also talk to a third party, while sitting with his head pressed into Stewart's. Which is exactly what they did on Tuesday's "The Daily Show."
Watch democracy in action: