At one time, the united states used a(n) to prohibit the import of all products made in cuba.

Explanation:

Embargo is the total prohibition of importing certain goods in a country. It is a governmental order that restricts commerce of certain goods with specified countries.

The first embargo U.S imposed on Cuba was on March 14, 1958 regarding the sale of arms. Then, another embargo was imposed on February 7, 1962 which prohibited sale and purchase of Cuban goods in almost all exports and imports.

Today some relaxations have been made on certain products, however, Cuba is still under embargo in the U.S.