significant numbers of americans can't find their own county on a map and even of those who can, many don't know where more than a handful of states are; it shouldn't surprise you at all that they aren't aware of which ten countries (most of which they've never heard of) are joining the EU, or even that there is an EU.
That's the true harbinger of spring, not crocuses or swallows returning to Capistrano, but the sound of a bat on the ball ~ Bill Veeck