In policing its borders as late as 2016, the E.U. suffered
the same plight as the U.S. did under its Articles of Confederation—only whereas
in the case of the U.S. the States retained all of their governmental sovereignty
under the Articles, some governmental sovereignty in the E.U. was already
lodged at the federal level. I contend that this perplexing disjunction between
extant federal competencies and state rights in the E.U. is not sustainable.
The full essay is at "E.U.'s Border-Control."