The United Kingdom took its anti-nationalisation case against Iran to the International Court of Justice at The Hague; PM Mosaddegh said the world would learn of a "cruel and imperialistic country" stealing from a "needy and naked people". The court ruled that it had no jurisdiction over the case. Nevertheless, the British continued to enforce the embargo of Iranian oil. In August 1952, Iranian Prime Minister Mosaddegh invited an American oil executive to visit Iran and the Truman administration welcomed the invitation. However, the suggestion upset Churchill, who insisted that the U.S. not undermine his campaign to isolate Mosaddegh because of British support for the U.S. in the Korean War.