Robert P. Griffin was elected to the U.S. House of Representatives in 1956. During his tenure, he worked with Rep. Phil Landrum to pass the Labor-Management Reporting and Disclosure Act of 1959, often referred to as the Landrum-Griffin Act. This law required union leadership to file financial disclosures, meet minimum standards for expulsion or discipline of union members, and conduct secret ballot elections. Griffin served as a United States Senator from 1966-1979 and as the Senate Minority Whip from 1969-1977. He was elected to the Michigan Supreme Court in 1986 and served until his retirement in 1994.