David Letterman, who we all know is a far leftist in his political views took shots at McCain for canceling his appearance. Was that fair? I'd say yes to a degree...

But, when you attack someone the way he did it got overboard.

 "This is not the John McCain I know, by God," Letterman said. "It makes me believe something is going haywire with the campaign." 

"Are we suspending it because there's an economic crisis or because the poll numbers are sliding?" Letterman asked.  

We can get a laugh from some of the jokes, but this is purely a cheapshot at McCain.

I don't think I'll be getting any political advice from David Letterman if I ever ran for office.