He argues Francois Bayrou at the French presidential election of 2007, and joined his campaign team, particularly to address the economic program. In 2008, at the municipal elections, he led the MoDem list in the 16th arrondissement of Paris, which collects 8.64% of votes in the first round, ranking fourth. Only elected on its list, he is borough councilor. June 13, 2008, he was appointed vice president of the MoDem for economic issues. He resigned from the board of the 16th arrondissement of Paris the 6th of January 2009 and of all his functions within the MoDem at the same time. He no longer has any ties partisan but an active participant of "Terra Nova (think tank)", the think tank of the left.