Final answer:
The Embargo Act of 1807 was an attempt to exert pressure on Great Britain after the Chesapeake affair by imposing a ban on all American exports. However, it had little impact on Britain and France and instead caused economic hardship in the United States. This led to a decline in support for President Jefferson and the Republican Party.
Step-by-step explanation:
The Embargo Act of 1807 was an attempt by President Jefferson to exert pressure on Great Britain after the Chesapeake affair. The act imposed a ban on all American exports in an effort to force Britain and France to respect American neutrality and stop seizing American ships. However, the act had little impact on these countries and instead devastated American merchants and the economy. The failure of the embargo led to a decline in support for Jefferson and the Republican Party, resulting in the revival of the Federalist Party.