Overall, Cheney looks very knowledgable/experienced, Edwards looks....somewhat uneasy.
You are SO right.
In fact, Cheney looks like he's enjoying this.
It reminds me of the conversations I used to have with an elderly neighbour of mine, a very knowledgeable man, when I started out in journalism school over 15 years ago.
I'd come home and visit him, and full of pompous idealism. I'd talk to him very passionately about topics - and in a measured way, he'd set me straight, without raising his voice.
What he was really saying was ''Little girl, you've a lot to learn'' :-)