“Treaty of Lisbon. Questions and Answers”. Europea.eu – Does the Treaty weaken Member States’ ability to have an independent foreign policy?
No. The European Union is asked to act when a coherent voice is needed on the international stage. A range of foreign policy issues are best addressed by the Member States of the European Union acting together.
The post of High Representative does not create new powers but streamlines EU external action avoiding duplication and confusion. He or she will act in foreign policy matters on the basis of decisions taken unanimously by the EU 27. He or she will complement not replace the foreign policy or diplomatic efforts of Member States.