Stephen Colbert Invades 'GMA'

George Stephanopoulos
ABC News Blogs

Stephen Colbert

joined us on "GMA" today. He talked about his new book, "America Again: Re-Becoming the Greatness We Never Weren't."

And of course I asked him about the debate tomorrow night. (He thinks President Obama and Mitt Romney should play rock, paper, scissors to see who has the first question.)

Colbert also weighed in on who he thinks is the most American American.

Don't miss it.

WATCH: Flashback: Colbert Reports for 'GMA' in 1997