What restriction would the government imposed in a closed economy?

The government would ban or prohibit trade with other countries.

Explanation:

A closed economy is known to be an economy which does not trade or transact business with other nations or countries. In other words, the economy does not import goods from other countries into the country and does not export goods to other countries. Thus, the economy depend on the goods and services produced in the country which makes them self sufficient. This is done in order to encourage and make provision for the growth of domestic or local industries within the country.

this headline suggests that midterm congressional   elections are at the corner and trump administration wants to activate his base by vowing to clamp down on immigrants and immigration as trump had said during his election campaign around two years ago. when a baby is born in usa, the baby becomes citizen of usa for 85 years and trump wants to end this rule of birthright citizenship to control illegal immigration and this what he said in an interview""we’re the only country in the world where a person comes in and has a baby, and the baby is essentially a citizen of the united states for 85 years, with all of those benefits,” "