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
Harold Jefferson Coolidge Sr. United States President Thomas Jefferson, through his maternal grandparents, Thomas Mann Randolph Jr. and Martha Jefferson Randolph. His paternal uncle was Thomas Jefferson Coolidge, the Boston businessman and U.S. Minister to France. Harold's great-uncles were Thomas Jefferson Randolph, George Wythe Randolph, Andrew Jackson Donelson, and his grandfather, Joseph Coolidge, was a distant relative of President Calvin Coolidge. Through his mother, Harold was the nephew of John Lowell Gardner II. His mother and uncle John were the grandchildren of merchant Joseph Peabody, one of the wealthiest men in the United States at the time of his death in 1844. Coolidge attended