Answer: The Obama presidency or the economic downturn
Explanation:
Isolationism of U. S causes Great Depression, and also contributed to the happening of World War II.
<h3>Impact of US isolationism </h3>
Isolationism is the philosophy in which the United State of America decided to no involvement in European and Asian conflicts and international politics. But the expansion of war put danger U.S economy and interests so that's why United States take part in the war.
So we can conclude that Isolationism of U. S causes Great Depression, and also contributed to the happening of World War II.
Learn more about war here: brainly.com/question/1420938
Basically it kept the colonies from expanding trade, and in turn kept the colony from expanding and getting new things. England saw the colonies as a threat, and did not want them to grow into another superhero in a new land.
Communication and the Hotline between the two
