<span>unjust or cruel exercise of authority or power</span>
It's a departure from the policy of neutrality because Roosevelt is no longer remaining removed from the conflict even though the US hasn't yet declared war on Germany and Japan. Previously this would be viewed as an act of war bc he is providing military aid to Great Britain and is firing at German U-boats, especially with his implementation of the shoot on sight policy of the U-boats later on(but before the U.S. entered the war).
It has became the greatest challenges in developing
constitution, and in order to resolve these challenges, the father of constitution
he had use the condition of informed method in which he had gained success in
the constitutional challenges that had come in their way.
If the border with Laos had been closed and North Vietnam had not been able to operate in the country, the communist side would not have been able to stock up on resources, men, ammunition, weapons, food and medicine through the HoChi Minh Trail.
Therefore, the forces of the North that were fighting in South Vietnam would have been out of supply, and their defeat would have been imminent.