After the June 5, 1963, uprising, Takhti was elected to the Central Committee of the Second National Front. From then on, he was known as a member of the opposition, not only to the people, but also to the SAVAK, the Shah's security apparatus, which repeatedly summoned him for intimidatory questioning. After Mosaddegh passed away on March 5, 1966, under house arrest in the village of Ahmadabad outside Tehran, Takhti was among the prominent figures who participated in his funeral, despite repeated threats from SAVAK agents. He reportedly told them, "Arrest me."