Final answer:
The Embargo Act of 1807 led to significant harm to American shipping and agriculture, causing widespread economic distress and political troubles for President Jefferson and the Republicans.
Step-by-step explanation:
One of the results of the Embargo Act of 1807, enacted under President Thomas Jefferson's administration, was that it badly hurt American shipping and agriculture. The intention of the Act was to exert economic pressure on Britain and France by prohibiting American ships from engaging in international trade, hoping that these European powers would stop their harassment and seizure of American vessels. However, it had little effect on Britain and France but resulted in significant economic distress at home, leading to widespread unemployment and a decrease in business activity by around 75 percent between 1808 and 1809. The Federalist Party found renewed vigor due to the discontent with Jefferson and the Republicans, and the embargo was eventually repealed in 1809.