Legislative Branch
Senate
Legislative ....... Or maybe judicial......... But probably executive....
The Legislative Branch of the United States government is the one that can confirm Presidential appointments. The Senate can sometimes hold a hearing to debate the issue and ask questions of the appointees before making a decision.
Congress must approve all appointments.
The Legislateive branch must aprove all of Supreme Court appointments
The legislative branch
Actually it is an interdependence. All three parts of the government has checks on the other parts. The legislature confirms appointments but the executive carries out the laws with these appointments. The judicial interprets the laws carried out by the executive and made by the legislative.
The President makes all appointments of judges and justices to the federal courts subject to confirmation by the Senate.
The legislative branch (US Congress) more specifically the US Senate, must confirm all appointments to Federal judgeships, and ratify all international treaties.
The U.S. Senate confirms the appointment all federal judges including the justices of the U.S. Supreme Court.
The Senate, one of two houses in the Legislative Branch, has the power to give their 'advice and consent' to all Presidential appointments. They also must consent to treaties.
The legislative branch checks the executive branch by giving it consent to all Presidential appointments. The President is therefore restrained from choosing an appointee with radical views. The legislative branch checks the judicial branch by passing laws that bind their decisions.