The two main sources of congressional authority in the field of foreign affairs lies in Article I and Article II. The phrase <span>"advise and consent" are the two pillars of the powers of the Congress regarding foreign affairs. I hope that this is the answer that has actually come to your desired help.</span>
They had members in public office
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.
