The economic and financial crisis brought essential changes to the Economic and Monetary Union regime. In fact, the relationship between the EU and Member States was strongly influenced by the economic and financial crisis. Related measures shaped and constrain to a certain extent the framework of preference formation by national actors in the field of
economic and fiscal policies.

The Member States agreed on reinforced fiscal rules and respective monitoring and surveillance procedures with far reaching impact on the national economic, budgetary and budgetary rules and frameworks. The Treaty limits and restricted EU financial resources led to the adoption of intergovernmental agreements, but pursuing and enhancing EMU objectives.

While the Member States’ original approach towards the Economic and Monetary Union was a rather positive and open one, the reform measures, both inside and outside the EU level, triggered tensions in various Member States, not only at political level. National constitutional laws, mainly the national budgetary autonomy as well as core national constitutional principles, such as social state or the federal structure, were put at stake. Many constitutional review proceedings were activated to clarify the compliance with the EMU crisis measures with the national and EU constitution and led to further development and declaration on the national identity concept in the context of EMU and related
integration.