Final answer:
Immigration to the United States declined in the 1930's due to the Great Depression, restrictive immigration policies, and anti-immigrant sentiments.
Step-by-step explanation:
In the 1930's, immigration to the United States declined for several reasons. One major factor was the Great Depression, which caused high unemployment rates and economic hardship. As a result, many Americans became resistant to immigration as they felt there were not enough job opportunities for themselves.
Additionally, the U.S. government implemented restrictive immigration policies during this time. The Immigration Act of 1924 established quotas that limited the number of immigrants, particularly from certain countries. This further contributed to the decline in immigration.
Furthermore, rising anti-immigrant sentiments among the American population, fueled by xenophobia and nativism, played a role in discouraging immigration. Americans who were already struggling economically blamed immigrants for taking away jobs and resources, leading to a negative perception of immigrants.