What was one way americans fought against the growth of mexican immigration?

During world war ll, the untied states was a member of the allies axis european theater pacific theater

How did the war of 1812 contribute to an increase in u.s. manufacturing? a) the war provided more resources for factories to increase production. b) the war promoted trade between countries so that americans could focus on fighting. c) the war cut americans off from their previous supply of imported manufactured goods. d) the war limited transportation in america, making it necessary to import manufactured goods.

Which of these events was a severe setback for the u.s. war effort in the pacific?