 In 1945, after her return to France, Jeannette Vermeersch was elected a deputy to the constituent assembly that met from 21 October 1945 to 5 May 1946, until the first proposal for a new French constitution was rejected by referendum.She was then elected, without interruption, to every sitting of the National Assembly until 1958, then moving up to the Senate, where she sat until 1968.On 17 September 1947, Maurice Thorez and Jeannette Vermeersch made their union official at the city hall of Choisy-le-Roi (today in Val-de-Marne département).