 She was concerned that the Communists had taken over the campaign in France and refused to involve the socialists or the trade union group the "Confédération Générale du Travail", (CGT).Paz asked members of the support committee she had organized for Thomas Mooney, an imprisoned American socialist, to take part in the Scottsboro campaign, including Bertrand Russell and Henri Barbusse.She organized a meeting that was attended by 4,000 people.