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  mostly irish, german, british, french, candian, and more
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  about 200,000 came to the U.S. and got recruited for construction and the transcontinental railroad.
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  for the first time in 300 years, the Japanese were allowed to leave their country. they faced the same prejudice that chinese immigrants faced.
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  italy, austria-hungary, and russia. these immigrants brought different cultures and languages.
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  prohibited chinese workers from entering the US and current immigrants couldn't send for their wives.
set the stage for more immigration restrictions - 
  
  the origins of immigrants must be proportional to the population.
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  400,000 refugees who were left homeless by WWII were allowed to come to the US.
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  relaxes the restrictions against immigration from Asia
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  mexicans and latin americans are still immigrating to the US today.
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  boosts immigration and gives priority to reuniting families. this attracted many highly skilled professionals
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  prompted a large arrival of southeast asian immigrants. allowed a more consistent flow of immigrants and emergency admissions.
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  criminalizes people who hire illegal immigrants. also gives amnesty to 3.2 million illegal immigrants
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  raised the limit on annual admissions to 675,000 immigrants. set number of visa were put aside for workers and families
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  the focus was to curb illegal immigration and increase border protection.