Which body must confirm the appointment of justices to the Supreme Court?

The appointment of justices to the Supreme Court is confirmed by the Senate. This process is part of the checks and balances established in the U.S. Constitution, specifically in Article II, Section 2. The President nominates candidates for the Supreme Court, but those nominations require the "advice and consent" of the Senate. This means that the Senate has the authority to hold hearings, ask questions, and ultimately vote to approve or reject the nominee. This requirement ensures that the appointment of justices is subject to legislative oversight, adding a layer of accountability to the process.

Other bodies mentioned do not play a role in this confirmation process. The Cabinet is composed of the heads of the executive departments and does not have a role in judicial appointments. The Supreme Court itself does not confirm its members; rather, the Court's role is to interpret the law and administer justice after justices are confirmed. The House of Representatives does not have any involvement in this aspect of judicial appointments, as its responsibilities and powers are distinct from those of the Senate.