I'm not sure what you mean by a "USA Draft". In America, our general term "draft" refers to heavy work horses such as Clydesdales, Shires, Percherons, Suffolks, Brabants, and Belgians. Most people who do not own a "draft" or heavy horse, just calls every heavy horse they see a draft horse because of their unfamiliarity with the different breeds. Halflingers and Fjords are considered Draft Ponies because of their conformation and ability to work as a heavy does. A horse that is half draft, lets say, half Clydesdale, is considered a Draft Cross or Half Draft, because they are a Draft/Heavy crossed with a lighter breed, such as a Thoroughbred or Arabian. Hope that helped? I have a Belgian and everyone asks me if he is a Clydesdale, they know he is bigger than the average Quarter Horse, but are not familiar with all the different Draft Breeds.