Why did the new immigrants make the trip to the u. s.

due to crop fallure, land and job shortages,and famine, many immigrants came to america because it provided new economic opportunity.

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president thomas jefferson commissioned the expedition shortly after the louisiana purchase in 1803 to explore and to map the newly acquired territory, to find a practical route across the western half of the continent, and to establish an american presence in this territory before britain and other european powers

answer; i do believe that the (14th)fourteenth amendment is the correct answer