President of the European Council extended his influence into financial policy, the most important area left to the rotating Council presidency, with the rotating presidency seeing a greater decrease in power than previously planned. Many of the changes introduced with the Lisbon Treaty need concretion through practical implementation by the current actors. The Spanish presidency unsuccessfully tried to challenge the European Council president's prominent post during the first rotating presidency of 2010, while the second half of the year saw a Belgian rotating presidency marked by a weakened caretaker government which did not challenge Herman van Rompuy, himself a Belgian politician. The Belgian rotating presidency
President of the European Council Commission President (who already sits in the European Council). This would allow the European Council to concurrently appoint one person to the roles and powers of both President of the European Council and President of the European Commission, thus creating a single presidential position for the Union as a whole. Since the creation of the European Council presidency, former president Van Rompuy and former Commission President Barroso had begun to compete with each other as Van Rompuy had benefited from the general shift in power from the Commission to the European Council yet with Barroso still holding the real powers.