I haven't watched Letterman in years. So I missed these "Old Man McCain" jokes of his:

"[McCain] kind of looks like the neighbor who says, 'Oh, that dead tree is on your property,' one of those guys"

"He looks like a guy with a collection of movies he bought at the car wash."

"How about John McCain? He looks like a guy at a restaurant that says I'm leaving 10%, that's good enough. John McCain, looks like the guy who goes to the curb for the paper and locks himself outside of the house."

I know, they're pretty shallow. But they made me laugh.