My question is, suppose for whatever reason Haiti instead declares war on the Dominican Republic? In this time of volatile politics, it could rapidly turn into a proxy war. Mussolini, in particular, with his love of grand gestures, might send troops to Trujillo in order to show the United States Italian military might right in their own backyard. Somoza might also get involved, and there was also some major US business interests in Haiti at this time.
This is something I'm really curious about and have been vaguely thinking of doing a timeline over, so any help you can give would be good.