Cabinet of the United States
The Cabinet of the United States is part of the executive branch of the federal government of the United States. The members of the Cabinet are the Vice President of the United States and the heads of the federal executive departments, all of whom — if eligible — are in the presidential line of succession.
The United States Constitution does not explicitly establish a Cabinet. The Cabinet's role, inferred from the language of the Opinion Clause (Article II, Section 2, Clause 1) of the Constitution, is to serve as the principal advisory body to the President of the United States. Additionally, the Twenty-fifth Amendment authorizes the Vice President, together with a majority of certain members of the Cabinet, to declare the President "unable to discharge the powers and duties of his or her office".
Members of the Cabinet (except for the Vice President) are appointed by the President, subject to confirmation by the Senate; once confirmed, they serve at the pleasure of the president, who can dismiss them at any time without the approval of the Senate, as affirmed by the Supreme Court of the United States in Myers v. United States (1926). All federal public officials, including Cabinet members, are also subject to impeachment by the House of Representatives and trial in the Senate for "treason, bribery, or other high crimes and misdemeanors", as per Article II, Section 4.
The President can also unilaterally designate senior advisers from the Executive Office of the President and heads of other federal agencies as members of the Cabinet, although this is a symbolic status marker and does not, apart from attending Cabinet meetings, confer any additional powers.