Secretary of State James Madison supported the embargo with equal vigor to Jefferson, while Treasury Secretary Gallatin opposed it, due to its indefinite time frame and the risk that it posed to the policy of American neutrality. The U.S. economy suffered, criticism grew, and opponents began evading the embargo. Instead of retreating, Jefferson sent federal agents to secretly track down smugglers and violators. Three acts were passed in Congress during 1807 and 1808, called the "Supplementary", the "Additional", and the "Enforcement" acts. The government could not prevent American vessels from trading with the European belligerents once they had left American ports, although the embargo triggered a devastating decline in exports.