He did his "research" on the notorious "birther central" site, World Nut Daily. The right wingers need to quit listening to their lunatic fringe. Before Birtherism, World Net Daily was ground central for "black helicopters" etc, they are just plain flat nuts. The GOP is literally going crazy right before our eyes, the whole country is taking notice, and their leadership is very concerned, this is just another sign of their implosion.
Here's an example of these crack pots and their crack pot legal theories that have been laughed out of every court they've tried to sling their manure into:
http://www.wnd.com/2012/02/128467/
They write about this stuff as if it is of great import, when it's all a load of crap. Sucker bait for chumps and rubes. The article is full of out right lies.