U.S Institution: EXECUTIVE AND JUDICIARY IN THE UNITED STATES PART III Among the president’s constitutional powers is that of appointing important public officials. Presidential nomination of federal judges, including members of the Supreme Court, is subject to confirmation by the Senate. Another significant power is that of granting a full or conditional pardon to anyone convicted of breaking a federal law except in a case of impeachment. The pardoning power has come to embrace the power to shorten prison terms and reduce fines. Presidential Power is under the control of Congress and depends on public opinions. The roles of the Cabinet are to advise and assist the President. The Cabinet of the United States is composed of the most senior appointed officers of the executive branch of the federal government of the United States, who are generally the heads of the federal executive departments. They are Vice President and the Heads of 15 Executive Departments.