Which amendment did some Americans criticize as not going far enough to make suffrage universal?

Some Americans criticized the 19th Amendment, ratified in 1920, for not going far enough to make suffrage universal because it only granted women the right to vote, while still allowing discriminatory practices to disenfranchise many, particularly African Americans, Native Americans, and other minority groups. Critics argued that the amendment failed to address systemic barriers such as literacy tests, poll taxes, and other forms of voter suppression that continued to affect marginalized communities. Thus, while a significant step forward for women's rights, the 19th Amendment did not achieve true universal suffrage.