his tenure, he worked to strengthen the state's stream pollution law despite facing strong opposition from the coal industry. He also fought against the mining industry after promoting legislation to prevent the discharge of mine silt into the Schuylkill River. The Desilting Act and Clean Streams Act (also known as the Brunner Act) were passed in 1945 under Duff's tenure as Attorney General. In 1946, John Bell, who had been elected Lieutenant Governor in 1942 and had ascended to the governorship following Martin's resignation for the US senate, declined to be a candidate in the upcoming 1946 gubernatorial election. Duff subsequently won the Republican nomination, and was elected the 34th Governor of Pennsylvania in the general election. His campaign focused on the issues of conservation, public health, and education. He handily defeated his Democratic opponent, former President pro tempore of the State Senate John Rice, by more than 557,000 votes. Duff was elected to the United States Senate from Pennsylvania in 1950, narrowly unseating Democratic Senator Francis J. Myers. After losing the 1956 election to Democrat Joe Clark in one of the closest elections in Pennsylvania history, Duff retired from politics, but remained in Washington, D.C., as a partner in the law firm of Davies, Richberg, Tydings, Landa & Duff. He died in Washington, D.C., and was buried in Carnegie, Pennsylvania. References External links 1883 births 1969 deaths American businesspeople in the oil industry American people of Welsh descent American Presbyterians Republican Party governors of Pennsylvania People from Mt. Lebanon, Pennsylvania Princeton University alumni Pennsylvania Attorneys General University of Pittsburgh School of Law alumni Republican Party United States senators from Pennsylvania Washington, D.C., Republicans 20th-century American politicians People from Carnegie, Pennsylvania University of Pennsylvania Law School alumni