Why did the vietnam war, and the domestic opposition to it, come to dominate american politics in the 1960s?

Donald trump will plan to use his emergency powers to build the wall between the us and mexico, instead of shutting down the government again?

What was the most important consequence of the large-scale ecological changes in africa two hundred thousand years ago?

How would high tariffs hurt america? a. fewer immigrants would be able to move to america b. sales of american products to other countries would go down c. americans would sell more goods to other countries d. goods imported from other countries would cost less