Heads of State and Government, supported by Foreign Ministers, reached agreement on all the key institutional issues in the Lisbon treaty, including the role of full-time President of the European Council, at the 2007 June European Council.
The treaty makes clear that the President of the European Council
“shall ensure the preparation and continuity of the work of the European Council in co-operation with the President of the Commission, and on the basis of the work of the General Affairs Council”.
The Commission President provides political guidance for the Commissioners and is the Commission’s principal representative in dealings with other EU institutions and with external bodies. Significant decisions by the Commission are taken collectively by the College of Commissioners.