Bill Clinton On Letterman Sept. 22

Last night it was Bill Clinton's turn on Letterman. Clinton was pretty impressive. I can see Obama, post presidency, doing something like Clinton's Global Initiative. This is just a clip. Watch the full video here.

Obama's appearance on Letterman the night before was the biggest show since Oprah was Dave's guest.

More than 7 million people watched president Obama visit David Letterman's CBS late night show on Monday.
Obama's appearance -- the first by a seated president to Letterman's show -- was no match for the 13 million who turned in to that episode in December of 2005 when Dave and Oprah kissed and made up, ending a years-long feud.
But it was Dave's biggest crowd since then. WaPo

Obama on Letterman: