The main difference is which part of Europe they came from, and the numbers of immigrants. There were many, many more "New Immigrants'" than old, 20 million people between 1880 - 1920. And the New Immigrants came mostly from southern and Eastern Europe, which meant they were almost all Catholics.
<span>I think it is</span><span> marine protection</span>
It supported the national government's sovereignty over matters of foreign policy and interstate commerce.