In 1975, thirty-five-year-old David Gardner defeated Belvin to become the Choctaw Nation's second popularly elected chief. 1975 also marked the year that the United States Congress passed the landmark Indian Self-Determination and Education Assistance Act, which had been supported by Nixon before he resigned his office due to the Watergate scandal. This law revolutionized the relationship between Indian Nations and the federal government by providing for nations to make contracts with the BIA, in order to gain control over general administration of funds destined for them.