The presidency of Calvin Coolidge began on August 2, 1923, when Calvin Coolidge became President of the United States upon the sudden death of Warren G. Harding, and ended on March 4, 1929. A Republican from Massachusetts, Coolidge had been Vice President of the United States for 2 years, 151 days when he became the 30th President of the United States. During Coolidge's presidency, the United States experienced a period of rapid economic growth known as the 'Roaring Twenties.' Unemployment remained low while the country's gross domestic product rose from $85.2 billion in 1924 to $101.4 in 1929. 'Farmers never have made much money,' said Coolidge, adding, 'I do not believe we can do much about it.'