In 1957 the Saarland was reintegrated into Germany as a federal state of the Federal Republic. The election of 1957 essentially dealt with national matters. His re-election campaign centered around the slogan "No Experiments". Riding a wave of popularity from the return of the last POWs from Soviet labor camps, as well as an extensive pension reform, Adenauer led the CDU/CSU to an outright majority in a free German election. In 1957, the Federal Republic signed the Treaty of Rome and became a founding member of the European Economic Community. In September 1958, Adenauer first met President Charles de Gaulle of France, who was to become a close friend and ally in pursuing Franco-German rapprochement. Adenauer saw de Gaulle as a "rock" and the only foreign leader whom he could completely trust.