Like it or not, the US Constitution, and the Declaration of Independence, are anything BUT popular documents. It was written in secret by a select group of people. Sure, there were debates, but they were anything open and above board until after the document was written. People forget that some people, the anti-Federalists, were against ratification of the constitution.
I don't totally agree with his analysis (the pronouns bit is anachronistic as heck), but he does make some very good points.
It wasn't written for the benefit of my ancestors who fought for independence and revolted at Morristown. It was written for the elite who said "We the people".