On 1 December 2004, 59% of the members of the Socialist Party decided to approve the proposed European Constitution. However, several well-known members of the Party, including Laurent Fabius, and left-wingers Henri Emmanuelli and Jean-Luc Mélenchon, asked the voters to vote "no" in the 29 May 2005 French referendum on the European Constitution, at which the proposed Constitution was rejected. 