Influenced by the activism her brother was carrying out, she joined the
Mouvement Jeunes Communistes de France in 1959 at an initiative for peace in Algeria. Jambu sat in the national office of the organisation in 1961 as well as the (UJFF). After the invalidation of her election in March 2001 by the
Conseil d'État, she won election for the final time in October 2002. Jambu resigned the mayorship effective 15 May 2004, being succeeded by her assistant
Marie-Hélène Amiable. She was elected
deputy for
Hauts-de-Seine's 11th constituency in the
National Assembly and took up her seat on 2 April 1993. Janine aligned her actions with the
Union of the Left, She was a member of the , the
Economic Affairs Committee, the and the
National Defence and Armed Forces Committee. == Death and legacy ==