Carol Anderson, Professor Of African American Studies at Emory University, and best selling author of White Rage: The Unspoken Truth Of Our Nation’s Divide, has a new book on voting rights entitled, One Person, No Vote. Available on September 11, 2018, this is the story of how absolutely fragile the voting franchise is in our country. Anderson details how these rights have been challenged before leading to several amendments to the U. S. Constitution that guarantee citizens' right to vote. Unfortunately, there are always those who want to make voting harder, especially for persons of color and poor people. Professor Anderson's newest book is very well written with extensive notes. It is a must read for anyone interested in learning about the history of voting in the United States of America.
In 1965, our Congress also passed the Voting Rights Act. See this link for brief timeline of voting rights up to 2016: https://www.aclu.org/timeline-history-voting-rights-act As you can see, citizens are again having to face efforts by some in power to keep others from be able to vote. In 2013, the Supreme Court of the United States, in Shelby vs. Holder, gutted a critical protection of the voting rights act, section 4. This allowed states to begin enacting voter new restriction laws. Since then there have been numerous court fights and decisions to restore voters' rights. A simple review of the ACLU timeline linked above is illuminating. There is no ABSOLUTE right to vote. Voting can be restricted.