Dan Quayle – today's quotation about public speaking

I hadn't heard about Dan Quayle's reputation, though at least I had heard of the man. I was researching quotations about public speaking and found this one.

Public speaking is very easy.
~ Dan Quayle

Intrigued, I had to find out more - what was the context?

Why did he say that?

Was he being arrogant?

Was he joking?

I still haven't discovered the context, but I have discovered some amazing statements attributed to him. What a speaker he really was!!