In the capacity of which role does the President have the power to appoint justices to the Supreme Court?

The President has the power to appoint justices to the Supreme Court in the capacity of Chief Executive. This role encompasses the authority to administer the federal government and appoint individuals to key positions within the executive branch, which includes federal judges and justices. The Chief Executive is responsible for ensuring that laws are faithfully executed and has the authority to shape the judiciary by nominating justices who will interpret the Constitution and federal laws.

While the President holds other significant roles, such as Commander in Chief of the armed forces, Legislative Leader, and Head of State—with each role carrying its own responsibilities—none of these directly relate to the judicial appointment power. The power to appoint Supreme Court justices is explicitly tied to the President's executive function, making Chief Executive the correct designation for this authority.