During the 1790s, the naturalization act changed the process for becoming a us citizen by

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Forcing new immigrants to wait longer before becoming citizens.

This act was created to slowed down the stream of immigrants and reduced the employment of citizens of United States.

Before this act, it only took around 5 years to become a citizen of United States.

After this act, that time has increased into 14 years.

From mexican american war , us gained new mexico.