All the evidence that I need to see to know that Mark McKinnon is a complete jackass.
If conservatives, and Republicans don't start fiercely and frequently standing up to these kinds of attacks, they'll never get back into power. Whomever is Bob Schiefer's GOP guest (assuming there is one on Sunday), should go out of his/her way to belittle Schiefer about working for a company that brings us the likes of David Letterman.
If the left can bully Imus into retirement about an extemporaneous, live and on-air comment about ADULT women, equal pressure should be applied to Letterman for a written remark delivered ON TAPE yet still aired in it's entirety.
Let’s not forget the other comments he made that night regarding Jews and Flight Attendants..