The USA is utterly different it was a union of 3 million anglo saxons mostly prodestant and all culturaly similar, all of them supporting the identical legal system. Further non anglo saxon immigrants were forced to interegrate, to some extend culturaly but totaly in terms of law and justice. To that effect america remains in it's laws and general sense of culture heavily anglo saxon. While Europe is a combination of distinctily different countries with there own seperate ways and means and no single thread of continuity running through it. Any intergration between the nation states would require each country to give up major slices of their culture and law for a single common european identity. This is what i fear and this is what the contitution despite it's claims of thinning out legistation is the first step towards.

On a side note the french rejected the constitution on large part due to it's tendacy to an British style economy based on much more open trade and far less socialist. We just approach life from different ends of the spectrum.