What amendment stated no one could be denied the vote?

The 15th Amendment to the United States Constitution, ratified in 1870, states that the right to vote cannot be denied or abridged by the federal or state governments on account of race, color, or previous condition of servitude. Additionally, the 19th Amendment, ratified in 1920, prohibits denying the right to vote based on sex. Together, these amendments aimed to expand voting rights in the U.S.