 The campaign also announced that it would use an unorthodox organizational structure, opting to have several regional campaign directors rather than one centralized staff.McCain began his overseas trip on March 16, arriving in Baghdad to meet with U.S. military officials as well as Iraqi political leaders.While the campaign was not involved in the trip, which was official Senate business, it served as a chance for McCain to highlight his credentials in foreign affairs, seen to be the main strength of his candidacy.