This is similar to public diplomacy but it's much more ... pointed than that. PD is/should be informative and aimed at persuading--what the IOC is doing/attempting to do, and what Canada did with agreements with US states, is more concrete than that. And it's aimed not at informing audiences so that public opinion or mobilization changes: it's aimed at directly changing policy by (to be blunt) forum-shopping. (Canada's strategy very clearly had massive PD elements. The IOC's strategy is much more like blackmail.)