(1872–1933), 30th president of the US 1923–29; full name John Calvin Coolidge. A Republican, he served as Massachusetts's lieutenant governor 1916–18 and governor 1919–20. He became the US vice president in 1921, succeeding to the presidency upon the death of President Harding in 1923. Elected in 1924 to serve a full term, Coolidge was committed to reducing income taxes and the national debt, and was noted for his policy of noninterference in foreign affairs, which culminated in the Kellogg Pact in 1928.