BERLIN, GERMANY - NOVEMBER 27: German Chancellor and Chairwoman of the German Christian Democrats (CDU) Angela Merkel signs the three parties' coalition contract with Chairman of the German Social Democrats (SPD) Sigmar Gabriel and Chairman of the Bavarian Christian Democrats (CSU) Horst Seehofer (not pictured) at the Bundestag on November 27, 2013 in Berlin, Germany. The three parties worked their way through arduous negotiations on policy issues that concluded with a 17-hour overnight session last night in order to hammer out the final details that will make a new German coalition government possible. The agreement still requires approval by party delegates, which especially in the case of the SPD is uncertain. (Photo by Sean Gallup/Getty Images)

BERLIN, GERMANY - NOVEMBER 27:  German Chancellor and Chairwoman of the German Christian Democrats (CDU) Angela Merkel signs the three parties' coalition contract with Chairman of the German Social Democrats (SPD) Sigmar Gabriel and Chairman of the Bavarian Christian Democrats (CSU) Horst Seehofer (not pictured) at the Bundestag on November 27, 2013 in Berlin, Germany. The three parties worked their way through arduous negotiations on policy issues that concluded with a 17-hour overnight session last night in order to hammer out the final details that will make a new German coalition government possible. The agreement still requires approval by party delegates, which especially in the case of the SPD is uncertain.  (Photo by Sean Gallup/Getty Images)