Mongolia gained control of the route in 1275 and kept it that way until it closed.
Answer:
Finally, a compromise was reached with the Southern states that guaranteed the continuance of the slave trade for 20 years after the adoption of the Constitution. That deal set the earliest expiration date as 1808 — which Congress met. Great Britain also banned the African slave trade in 1807.
So yes they agreed to wait 20 years
If you mean supreme leader,Dictatorship does for example Kim jong un is a supreme leader and a dictator of North korea
Congress had no power to coin money
Congress was unable to impose taxes
No national court system was established to protect the rights of U.S citizens
Congress was unable to regulate interstate and foreign commerce