In 1919, Cotton was elected town moderator of Lexington. Two years later he was elected to the town's board of selectmen. In 1923 he was elected to the Massachusetts House of Representatives and in 1927 he was elected to the Massachusetts Senate in the 7th Middlesex District.[3] In 1928 he faced a tough primary fight against Alice F. D. Pearson, the wife of former Senator Gardner Pearson. Cotton won 6,115 votes to 4,576. He was never challenged for the Republican nomination again.[2] In 1938, Senate President Samuel H. Wragg was elected Sheriff of Norfolk County, Massachusetts, and Cotton was chosen to succeed him with little opposition.[4] In December 1939, Cotton was appointed to the additional position of chairman of the state Public Utilities Commission.[2][5] Cotton did not run for reelection in 1940 and instead was named secretary to Massachusetts GovernorLeverett Saltonstall.[3]
Judicial career
In 1943, Cotton was appointed as an associate judge of the Massachusetts Land Court. He remained on the court until his retirement in 1965. Cotton died on October 28, 1983, following a long illness.[3]
^ abcHennessy, M.E. (January 27, 1940). "Cotton Has Two Jobs, One Salary: President of Senate, and on Utilities Commission". The Boston Daily Globe.
^ abc"Judge Joseph R. Cotton, 92: Was Senate President". The Boston Globe. October 28, 1983.
^Merrill, John D. (December 25, 1938). "Politics and Politicians". The Boston Daily Globe.
^"New Chairman of P. U. C. Native of Charlestown: Joseph R. Cotton, President of State Senate and Resident of Lexington, Is Still Single at 49". The Boston Daily Globe. December 10, 1939.