Answer: Calvin Coolidge
Explanation: Calvin Coolidge (1872-1933), the 30th U.S. president, led the nation through most of the Roaring Twenties, a decade of dynamic social and cultural change, materialism and excess. He took office on August 3, 1923, following the sudden death of President Warren G. Harding (1865-1923), whose administration was riddled with scandal. Nicknamed “Silent Cal” for his quiet, steadfast and frugal nature, Coolidge, a former Republican governor of Massachusetts, cleaned up the rampant corruption of the Harding administration and provided a model of stability and respectability for the American people in an era of fast-paced modernization. He was a pro-business conservative who favored tax cuts and limited government spending. Yet some of his laissez-faire policies also contributed to the economic problems that erupted into the Great Depression.