Here's a brief answer, maybe you can elaborate on it.
What the Framers created was a constitutional representative republic. Sovereignty is vested in the people, like a democracy (and unlike a
constitutional monarchy), but the people do not rule directly. Instead,
they elect representatives, at regular intervals, and these rule in the
peoples' stead. Their powers are limited, first, by the fact that they
are elected for only short terms, and must be re-elected if they wish
to continue in power, and secondly, and much more importantly, by the
Constitution itself, which puts express written limits on their powers
even between elections.
