Answer:
Amendment XV - Rights Not to Be Denied on Account of Race (1870) Section 1. The right of citizens of the United States to vote shall not be denied or abridged by the United States or by any state on account of race, color, or previous condition of servitude.
Explanation:
Every state constitution has different language regarding the right to vote. Still, the most important thing voting-rights advocates can proactively do to prevent further attacks on voting rights such as voter ID is to strengthen their state's constitutional language regarding the right to vote.