Calvin Coolidge to work jointly with Edward T. Clark, a Massachusetts Republican organizer whom he retained from his vice-presidential staff, as Secretaries to the President (a position equivalent to the modern White House Chief of Staff). Perhaps the most powerful person in Coolidge's Cabinet was Secretary of the Treasury Andrew Mellon, who controlled the administration's financial policies and was regarded by many, including House Minority Leader John Nance Garner, as more powerful than Coolidge himself. Secretary of Commerce Herbert Hoover also held a prominent place in Coolidge's Cabinet, in part because Coolidge found value in Hoover's ability to win positive publicity with
Calvin Coolidge W. Case, using the Phonofilm sound-on-film process he developed for Lee DeForest, filmed Coolidge on the White House lawn, making Coolidge the first president to appear in a sound film. The title of the DeForest film was "President Coolidge, Taken on the White House Grounds". When Charles Lindbergh arrived in Washington on a U.S. Navy ship after his celebrated 1927 trans-Atlantic flight, President Coolidge welcomed him back to the U.S. and a sound-on-film record of the event exists. Calvin Coolidge John Calvin Coolidge Jr. (; July 4, 1872 – January 5, 1933) was an American politician and the 30th President