The European Union can be regarded as political and economic union which consists of 27 member states , and the base is situated primarily in Europe
It serve as trade agreement which unites all European countries having single trading goal. Credits: ayfat23
I believe the answer is: Immigrants were associated with anarchism and communism
During that period, united states was involved in the cold war against the Soviet Union. At that time, most people were scared that the agents from communist countries could come into united states through immigration process, which create the anti-immigration hysteria.
Eastern Europe fell into authoritarian rule, because of US unwillingness and general fatigue of the war to start Operation Unthinkable- Churchill’s plan to liberate Eastern Europe from Soviet influence. EAEuropean countries were forced to accept authoritarian regimes supported by the large amounts of Red Army units in their countries in 1945.