Rubuta ci gaba don wannan sakin layi - Ya yi murabus a 1919, duk da haka, don karɓar matsayi tare da Ma'aikatar Harkokin Wajen Amurka a matsayin mai ba da shawara kan harkokin kudi ga Haiti, a lokacin da jamhuriyar tsibirin ta mamaye
da sojojin ruwan Amurka. A lokacin da yake a Haiti, ya yi karo da shugaban Haiti Philippe Sudré Dartiguenave kan batutuwan tattalin arziki, wanda ya haifar da McIlhenny ya dakatar da albashin Dartiguenave, wanda ya haifar da rikicin diflomasiyya da kuma gayyatar sukar sirri daga Ma'aikatar Harkokin Wajen Amurka.