vegankid posts a blog on the history of white immigrants in the United States and how it effected teh Black population in the U.S.:
Along with the movement was an economic offensive making it more difficult for Black people to earn a living outside the system of slavery. It was at this time that a famine in Ireland and politics throughout Europe sent millions of White immigrants to the shores of the U.S. Between 1830 and 1860 more than five million such immigrants settled in American cities. The effect was devastating to the Black workforce, but played well into the hands of slaveholders.
