Are EU member states still concerned about the EU encroaching on their national sovereignty in the ${21}^{st}$ century?

Yes, this was evident in the rejection of the Constitutional Treaty in $2004$ and Brexit.

No$,$ once the Maasthrict Treaty was signed, national sovereignty issues were no longer relevant.

Only the newer member states seem to still have this concern, but the older member states are no longer concerned with national sovereignty issues.

The EU is now entirely a supranational institution so it's a moot point.

Are EU member states still concerned about the EU encroaching on their national sovereignty in the ${21}^{st}$ century?

Yes, this was evident in the rejection of the Constitutional Treaty in $2004$ and Brexit.

No$,$ once the Maasthrict Treaty was signed, national sovereignty issues were no longer relevant.

Only the newer member states seem to still have this concern, but the older member states are no longer concerned with national sovereignty issues.

The EU is now entirely a supranational institution so it's a moot point.

Are EU member states still concerned about the EU encroaching on their national sovereignty in the ${21}^{st}$ century?

Yes, this was evident in the rejection of the Constitutional Treaty in $2004$ and Brexit.

No$,$ once the Maasthrict Treaty was signed, national sovereignty issues were no longer relevant.

Only the newer member states seem to still have this concern, but the older member states are no longer concerned with national sovereignty issues.

The EU is now entirely a supranational institution so it's a moot point.

Are EU member states still concerned about the EU encroaching on their national sovereignty in the ${21}^{st}$ century?

Yes, this was evident in the rejection of the Constitutional Treaty in $2004$ and Brexit.

No$,$ once the Maasthrict Treaty was signed, national sovereignty issues were no longer relevant.

Only the newer member states seem to still have this concern, but the older member states are no longer concerned with national sovereignty issues.

The EU is now entirely a supranational institution so it's a moot point.

Are EU member states still concerned about the EU encroaching on their national sovereignty in the ${21}^{st}$ century?

Yes, this was evident in the rejection of the Constitutional Treaty in $2004$ and Brexit.

No$,$ once the Maasthrict Treaty was signed, national sovereignty issues were no longer relevant.

Only the newer member states seem to still have this concern, but the older member states are no longer concerned with national sovereignty issues.

The EU is now entirely a supranational institution so it's a moot point.

Are EU member states still concerned about the EU encroaching on their national sovereignty in the ${21}^{st}$ century?

Yes, this was evident in the rejection of the Constitutional Treaty in $2004$ and Brexit.

No$,$ once the Maasthrict Treaty was signed, national sovereignty issues were no longer relevant.

Only the newer member states seem to still have this concern, but the older member states are no longer concerned with national sovereignty issues.

The EU is now entirely a supranational institution so it's a moot point.