Blaine continued to lobby for his Inter-American Conference. Among other things, he wrote an article titled "The Foreign Policy of the Garfield Administration", in which he revealed that his idea for a Conference had a second motive in addition to avoiding war: commercial relations. He linked the two ideas together by arguing that greater commercial inter-dependence would lead to growth and stability, and thus peace. It was also clear that the mix of nationalism and continentalism continued, since Blaine acknowledged that it was in the self-interest of the U.S. to find new markets in the Hemisphere. To achieve this he proposed an American customs union, or "zollverein", which would give preference to inter-American trade and reduce that with Europe, especially England. The resulting greater isolation of America from Europe, Blaine believed, would make it less likely that "the United States would have to defend the Monroe Doctrine". These ideas had little impact on the administrations of Chester Arthur (Republican, 1881–1885) or Grover Cleveland (Democrat, 1885–1889). However, Blaine did have the backing of influential businessmen and church and peace groups, which in turn lobbied the Congress. As a result, Congress adopted a resolution (24 May 1888) which urged a reluctant President Grover Cleveland to hold the Conference. With little enthusiasm, Cleveland's Secretary of State Thomas F. Bayard sent the invitations in July 1888. This was late in Cleveland's term, and the Conference was scheduled to be held during the presidency of his successor. This successor, Benjamin Harrison, returned Blaine to the post of Secretary of State and encouraged him to move ahead with the Conference. By this time the original motivation of developing mechanisms for peaceful resolution of disputes was openly joined by the commercial motivation, which at times seemed to overwhelm the search for peace. One measure of this shift was the composition of the U.S. delegation: with ten members, it was by far the largest, and most of the delegates were from commerce and industry. Further, it was decided that before the Conference got down to serious business the delegates would go on an extended six-week rail trip through the major industrial and commercial centers of the United States as far west as Chicago. This accomplished, the twenty-seven delegates from thirteen countries settled in to tackle their substantial agenda. Two nations which might have been expected to play a major role, were passive: Brazil because of internal political developments