Who maintains American neutrality

The Embargo Act.

Jefferson's solution to the problems with Great Britain and France was to deny both countries American goods. In December 1807, Congress passed the Embargo Act, which stopped exports and prohibited the departure of merchant ships for foreign ports.

Explanation:

The Proclamation of Neutrality was a formal announcement issued by U. S. President George Washington on April 22, 1793 that declared the nation neutral in the conflict between France and Great Britain. It threatened legal proceedings against any American providing assistance to any country at war.

When war broke out in Europe, the United States immediately declared its neutrality. President Woodrow Wilson stated that America must be "impartial in thought as well as in action." For a century, the U. S. had stayed out of European affairs. Most Americans preferred to continue this policy.

After a fierce debate in Congress, in November of 1939, a final Neutrality Act passed.