Among the groups listed, African Americans gained significant political participation as a result of amendments added to the U.S. Constitution. The 15th Amendment, ratified in 1870, granted African American men the right to vote, although this right was often suppressed through discriminatory practices until the Voting Rights Act of 1965.
While other groups such as Native Americans, Asian Americans, and Hispanic Americans have also gained political participation through various legal changes and civil rights movements, the specific amendments most directly affecting voting rights relate predominantly to African Americans.
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Native Americans were not considered U.S. citizens until 1924, and even after that, many states found ways to keep them from voting.
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Asian Americans faced significant legal barriers, including the Chinese Exclusion Act (1882) and others that prevented them from becoming citizens and voting until mid-20th century changes.
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Hispanic Americans have experienced various levels of political participation over time, influenced by immigration laws and civil rights movements, but their situation is not directly tied to specific constitutional amendments in the same manner as African Americans.
Therefore, while all these groups have advocated for and gained more political participation over time, the most direct constitutional changes impacting political participation were experienced by African Americans.
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