The decline in the number of new american jobs in the early twenty-first century had the most impact on:

Answer: Minorities

Remember that a considerable amount of the United States' population who worked minimum wage jobs were all minorities (Asians, Hispanics, African Americans, etc ...). The decline of these new national jobs in the early 21st century was really devastating for them, as the US was relying more and more on importation from mass-producing countries such as China.