Why don't you quote the entire sentence instead of cutting it off in the middle.
You're so far up your own ass. So let me help you.
"Not much unlike the entire principle of EU"
The principle of United States. And the European Union. Is the same.
Multiple smaller states that each have their own laws. Bound by a greater entity that has laws EVERYONE has to follow.
Each state have representatives to the greater union where they legislate and create policies concerning the entire union.