Well because of the great depression many factories were just lying around not producing anything but when the us as attacked by japan almost immediately those factories were up and running to make war supplies and they needed workers so almost no unemployment in the us and everyone was making money.
Two actions that were taken by the federal government : Firstly, They didn't honor many treaties that they had. Another is that In 1831 the Chief Justice of the Supreme Court, John Marshall, had attempted to define their status. I hope this helps.
Have a wonderful rest of the day :).
John Robert Lewis (born February 21, 1940) is an American politician and civil rights leader. He is the U.S. Representative for Georgia's 5th congressional district, serving since 1987, and is the dean of the Georgia congressional delegation. His district includes three-quarters of Atlanta.