But just twelve hours later he appeared at the White House, his face wreathed in smiles. On behalf of his Imperial Master he had the honor to request the President of the United States to act as arbitrator between Germany and Venezuela. The orders to Dewey were never sent, the President publicly congratulated the Kaiser on his loyalty to the principle of arbitration, and, at Roosevelt's suggestion, the case went to The Hague. Not an intimation of the real occurrences came out till long after, not a public word or act marred the perfect friendliness of the two nations. The Monroe Doctrine was just as unequivocally invoked and just as inflexibly upheld as it had been by Grover Cleveland eight years before in another Venezuelan case. But the quiet private warning had been substituted for the loud public threat. The question of the admission of Japanese immigrants to the United States and of their treatment had long disturbed American international relations. It became acute in the latter part of 1906, when the city of San Francisco determined to exclude all Japanese pupils from the public schools and to segregate them in a school of their own. This action seemed to the Japanese a manifest violation of the rights guaranteed by treaty. Diplomatic protests were instantly forthcoming at Washington; and popular demonstrations against the United States boiled up in Tokyo. For the third time there appeared splendid material for a serious conflict with a great power which might conceivably lead to active hostilities. From such beginnings wars have come before now. The President was convinced that the Californians were utterly wrong in what they had done, but perfectly right in the underlying conviction from which their action sprang. He saw that justice and good faith demanded that the Japanese in California be protected in their treaty rights, and that the Californians be protected from the immigration of Japanese laborers in mass. With characteristic promptness and vigor he set forth these two considerations and took action to make them effective. In his message to Congress in December he declared: "In the matter now before me, affecting the Japanese, everything that is in my power to do will be done and all of the forces, military and civil, of the United States which I may lawfully employ will be so employed ... to enforce the rights of aliens under treaties." Here was reassurance for the Japanese. But he also added: "The Japanese would themselves not tolerate the intrusion into their country of a mass of Americans who would displace Japanese in the business of the land. The people of California are right in insisting that the Japanese shall not come thither in mass." Here was reassurance for the Californians.