An excerpt from his 60 Minutes interview from Sunday:

On never flying commercial again:

Lots of these politicians fly around with Secret Service and Air Force One and all that… Then they step down and all of a sudden they’re flying first class on a commercial plane. I don’t have to do that. I have a private plane. But I fly commercial when I go to environmental conferences.

The funny/sad/disgusting thing is he doesn’t even realize how moronic this is.