Final answer:
The American Dream was pressed upon nationalists because it was seen as a key to success and upward mobility. Through hard work, anyone could achieve financial success, regardless of their background. This dream became a reality for millions of Americans.
Step-by-step explanation:
The American Dream was pressed upon nationalists for so long because it was seen as a key to success and upward mobility. Immigrants who came to the United States viewed assimilation into mainstream society as necessary for achieving economic opportunities and improving their way of life. They believed that through hard work, anyone could achieve financial success, regardless of their background. This dream became a reality for millions of Americans.