Which of the following presidential appointments does NOT require Senate confirmation?

The appointment of White House staff does not require Senate confirmation because these positions are considered part of the executive office and are directly appointed by the President. This allows the President to select individuals who align closely with their policies and agenda without the lengthy process of Senate approval.

In contrast, positions like United States attorneys, Supreme Court justices, and heads of executive agencies are significant appointments that involve a more formal confirmation process to ensure accountability and oversight by the legislative branch. This difference highlights the unique role of White House staff, who operate within the confines of the President's immediate team and do not directly influence the broader government structure in the same way as the other roles mentioned.