In 1929, he was promoted to the governorship of Bình Thuận Province and was known for his work ethic. In 1930 and 1931, he helped the French suppress the first peasant revolts organized by the communists. According to Fall, Diệm put the revolution down because he thought it could not sweep out the French, but might threaten the leadership of the mandarins. In 1933, with the ascension of Bảo Đại to the throne, Diệm accepted Bảo Đại's invitation to be his interior minister following lobbying by Nguyễn Hữu Bài. Soon after his appointment, Diệm headed a commission to advise on potential administration reforms. After calling for the French to introduce a Vietnamese legislature and many other political reforms, he resigned after three months in office when his proposals were rejected. Diệm denounced Emperor Bảo Đại as "nothing but an instrument in the hands of the French," and renounced his decorations and titles from Bảo Đại. The French then threatened him with arrest and exile.