Happily Hayes's stormy political relations were balanced by comparative quiet in foreign affairs. Only Mexico caused trouble, and that was of negligible importance. A few raiders made sporadic excursions into Texas, which necessitated an expedition for the punishment of the marauders. General Ord was directed to cross the border if necessary, but General Diaz, at the head of the Mexican government, concluded an agreement for cooperation with the United States in the protection of the boundary. The agreement was only partly successful, however, and on several occasions troops crossed the Rio Grande and fought with bandits. On the Pacific Coast, meanwhile, the Chinese question was becoming a political issue. In earlier times the immigration of the Chinese had been encouraged because of the need of a cheap labor supply when the transcontinental railroads were being built. As the coast filled up, however, with native population, and the demand for laborers fell off, there arose numerous objections to the oriental. It was seen that since he was willing to work for extremely low wages he could drive American laborers out of their places. Labor leaders such as Dennis Kearney held meetings on the "sand lots" in San Francisco and aroused anti-Chinese feeling. Riots and violence, even, were not unknown. Just before the inauguration of President Hayes a commission of inquiry had visited the coast and examined many witnesses. The commission reported that the resources of the Pacific states had been more rapidly developed with coolie labor than they would otherwise have been, but that the Chinese lived under filthy conditions, formed an inferior foreign element and were, on the whole, undesirable. It recommended that the executive take steps in the direction of a modification of the existing treaty with China, for fear that the problem might spread eastward with increasing immigration. The electioneering possibilities of the subject had appealed to both parties and they had earnestly demanded action in their platforms of 1876. Opinion was forming throughout the country, aided by Bret Harte's famous lines: Which I wish to remark And my language is plain, That for ways that are dark And tricks that are vain, The heathen Chinee is peculiar Which the same I would rise to explain.