This excerpt is from the U. S. Con Article II, Section 2
He (the president) shall have Power, by and with the Advice and Consent of the Senate, to make Treaties, provided to thirds of the Stone
and he shall nominate, and by and with the Advice and Consent of the Senate, shall appoint Ambassadors, other public Misters and Contes
supreme Court, and all other Onicers of the United States, whose Appointments are not herein otherwise provided for and which has been
the Congress may by Law vest the Appointment of such inferior Officers, as they think proper, in the President alone in the courts of the
Departments
Which fundamental principle of U. S. democracy does this excerpt describe?