>The EU has a real challenge ahead in leaving a place for regional and national self-determination, and ironically an EU constitution might be the best path to limiting its power, just like the US constitution somewhat acts to protect the states from the federal government.

This would be really neat to see. As an American I very much want a strong EU to act as a check on the US and help push back against China's influence. A fractured europe will not be able to withstand the pull between the US and China