Among the groups listed, African Americans gained more political participation with the addition of amendments to the Constitution, particularly the 15th Amendment, which prohibits the denial of the right to vote based on race, and the 13th and 14th Amendments that abolished slavery and granted citizenship and equal protection under the law, respectively.
While other groups like Native Americans, Asian Americans, and Hispanic Americans also gained political rights through various laws and amendments, the significant impact of constitutional amendments on African American political participation is particularly notable in U.S. history.