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 won the sympathy of the country. Unlike previous first ladies, who had withdrawn almost entirely from the public spotlight after personal tragedies, Coolidge resumed her official duties after a few months. In 1929, Calvin Coolidge's term as president ended, and the couple retired to Northampton. After her husband's death in 1933, Coolidge continued her work with the deaf and wrote for several magazines. She served on the boards of Mercersburg Academy and the Clarke School. After the start of World War II, Grace joined a local Northampton committee dedicated to helping Jewish refugees from Europe, and loaned her house to