Switzerland is in some EU institutions like Schengen. Thus EU membership has lots of asterixes and grey areas unlike the US which is a federacy the EU is a con

Switzerland is in some EU institutions like Schengen. Thus EU membership has lots of asterixes and grey areas unlike the US which is a federacy the EU is a confederacy (Look at Brexit). Switzerland is somewhat unique in that it's both EU and not EU. Take the UK for instance -- their grey area is "Northern Ireland".