What do historians do when using the historical thinking skill of analyzing historical sources

What was the u. s. government's office of indian affairs responsible for doing?

By the end of the 1800s, there was a change in the nature of the immigrants coming to the united states. immigration from northern europe—england, ireland, germany, and scandinavia—declined, while immigration from italy, russia, and austria-hungary grew. in fact, between 1900 and 1910, more than three-fourths of all immigrants came from these three countries. unfortunately, these countries were far removed england, the home of our founders, and the immigrants who came from them had a hard time adjusting to life in their new country.

What are some differences between mccarthy’s “west virginia speech” and his “letter to president truman”? what are some similarities?