<prompt> Bhala okuqhubekayo kwalesi sigaba - Ukuvikelwa kwabaholi bezwe abakhethiwe kanye nezinye izikhulu zikahulumeni kungenye yemisebenzi eyinhloko ye-Secret Service. Ngemva kokubulawa kukaMongameli uWilliam McKinley ngo-1901  <response>: , iCongress yabuye yayala iSecret Service ukuba ivikele umongameli wase-United States. I-Secret Service iphenya izinkulungwane zezigameko unyaka ngamunye zabantu abasongela umongameli wase-United States. 