Except the US still has a number of trade embargoes in place with Cuba, so while they could ask for help it's possible the people they ask would be legally bound to say no. Lifting decades old sanctions that hurt both Cuba and the US (in hundreds of millions of dollars in lost export trade) would be something the US could, and should, do.
A trade embargo with a country on grounds of it being ideologically different falls under "interfering unnecessarily" in my opinion.