According to one source, "David Barton is the Founder and President of WallBuilders, a national pro-family organization that presents America's forgotten history and heroes". Another source says "The Religious Right's leading practitioner of this type of historical revisionism."
OK, so which is it. I've done quite a bit of research on the presentation that Barton gives in the US Capitol, and I find his presentation to be generally accurate. Some conclusions are made pretty quickly by our host, and facts are slightly stretched in a couple cases.
I dug into it, now my dare to you is to prove it wrong. Check it out for yourself if you don't believe me, but no matter what, this video is worth watching.