The United States did experience major waves of immigration during the colonial era.
The first part of the 19th century and from the 1880 to 1920.
Many immigrants came to America seeking greater economic opportunity. while some, such as the Pilgrims in the early 1600 arrived in search of religious freedom.
The six principle of the Constitution are Popular Sovereignty, Limited Government, Checks and Balances, Separation of Powers, Republicanism, and Federalism.