Late Show host David Letterman with a new segment on what our former presidents are up to these days.

LETTERMAN: You know, what I was thinking about. A lot of times presidents are better remembered for the work they do after office, and so I said, let's put together if we can a collection, an assortment of presidents and what they are known for after they leave office.

Because many times they're unencumbered by government and bureaucracy. They're able to actually get things done. So here's the segment tonight, Presidential Second Acts.

Watch it and weep.