SS President Coolidge Newport News, Virginia built the two ships, completing "President Hoover" in 1930. The keel for "President Coolidge" was laid 22 April 1930 and the ship was delivered 1 October 1931. They were the largest merchant ships built in the United States up to that time. Each ship had turbo-electric transmission, with a pair of steam turbo generators generating current that powered propulsion motors on the propeller shafts. Westinghouse built the turbo generators and propulsion motors for "President Coolidge" but General Electric built the turbo generators and propulsion motors for "President Hoover". In the "President Coolidge" twelve Babcock & Wilcox superheater
Grace Coolidge occupied what is now known as the Calvin Coolidge House until 1930. Calvin Coolidge's political career took off in 1907 when he was elected to the Massachusetts General Court. After his term in the state legislature ended, he served three consecutive one-year terms as Lieutenant Governor of Massachusetts (1916–1918), and one term as Governor of Massachusetts (1919–1921). In 1920, he was elected Vice President and took office in March 1921. Grace did not maintain much of a public profile. The Coolidges had two sons, John (1906–2000) and Calvin (1908–1924) In 1921, as wife of the Vice President of the United