Who must confirm the President's Cabinet nominees?

The confirmation of the President's Cabinet nominees is the responsibility of the Senate. This process is outlined in the U.S. Constitution, where it states that the President shall appoint ambassadors, other public ministers and consuls, judges of the Supreme Court, and all other officers of the United States, with the advice and consent of the Senate. This mechanism serves as a system of checks and balances, ensuring that while the President has the authority to select their Cabinet members, the Senate has the power to review and approve those appointments before they take effect. This helps maintain oversight of the executive branch and ensures that nominees are qualified for their respective roles.