The POTUS has the right to engage in and break any contract with foreign entities, it is a primary function of the executive office. He has the right to declare war on any foreign entity, and that is inclusive of financial war not only kinetic. So no court in the country can enforce any foreign contract, they will have to take it up with the international courts, and even then they cannot over ride our constitution. Present this to the courts and tell them if they fail to abide by our constitution then they are advocates for foreign entities and will be deemed as abetting and aiding a foreign enemy and charged with treason.