The provincial presidents were appointed by the national government and were, in theory, charged with governing the province. In practice, however, their power was intangible, varying from province to province based upon each president's relative degree of personal influence and personal character. Since the national government wanted to ensure their loyalty, presidents were, in most cases, sent to a province in which they had no political, familial or other ties. In order to prevent them from developing any strong local interests or support, presidents would be limited to terms of only a few months in office. As the president usually spent a great deal of time away from the province, often traveling to their native province or the imperial capital, the de facto governor was the vice-president, who was chosen by the Provincial Assembly and was usually a local politician. With little power to undermine provincial autonomy, the president was an agent of the central government with little function beyond conveying its interests to the provincial political bosses. Presidents could be used by the national government to influence, or even rig, elections, although to be effective the president had to rely on provincial and local politicians who belonged to his own political party. This interdependency created a complex relationship which was based upon exchanges of favors, private interests, party goals, negotiations, and other political maneuvering.