For practical purposes the EU does have a constitution, it's just a messy collection of treaties rather than a single codified constitution (see https://en.wiki

For practical purposes the EU does have a constitution, it's just a messy collection of treaties rather than a single codified constitution (see https://en.wikipedia.org/wiki/Treaty_establishing_a_Constitution_for_Europe https://en.wikipedia.org/wiki/Treaty_establishing_a_Constitu... for why).