Manuel Valls

France's newly appointed Prime minister Manuel Valls (L) speaks with French President Francois Hollande before the first cabinet meeting of his government, at the Elysee Palace in Paris, on April 4, 2014.

Fred Dufour/AFP

Manuel Valls (left), France’s newly appointed prime minister, meets President François Hollande before the first cabinet meeting of his government, at the Élysée Palace in Paris.

France's outgoing Prime minister Jean-Ma...France's outgoing Prime minister Jean-Marc Ayrault (R) waves as he leaves the Hotel Matignon after the take over ceremony, on April 1, 2014 at in Paris. France's new Prime Minister Manuel Valls faced a delicate balancing act as he set about forming a new government tasked with reviving the economy and reining in public financesAFP PHOTO / LIONEL BONAVENTURELIONEL BONAVENTURE/AFP/Getty Images

Lionel Bonaventure/AFP

France’s departing prime minister, Jean-Marc Ayrault, leaves the Hôtel Matignon after a handover ceremony in Paris. He has been replaced by Manuel Valls, who poses a potential threat to President François Hollande, whose popularity remains low.