"Black men earn 87 cents on the dollar compared to White men, and Black households have, on average, just 10% of the net worth of White households. According to one study, immigrant waves between 1980 and 2000 may account for up to 60% of the decline in Black wage rates relative to Whites.
To be sure, high levels of immigration hurt workers in all demographic groups. According to Harvard economist and immigration expert George J. Borjas, increasing the number of workers in any given group by 10%, for example through immigration, is likely to result in a 3% reduction in wages. But it's the less-skilled workforce, which is disproportionately made up of minority workers, that immigration hits hardest."