James Wilson
Hope this helps :))
The act is called the Voting Rights Act of 1965.
This act, signed into law by Lyndon B. Johnson, helped to remove legal barriers that African-Americans faced when it came to voting. For example, African-Americans were unfair targets of things like literacy tests, poll taxes, and the grandfather clause. All three of these barriers were put in place to limit the amount of African-American citizens voting in local, state, and national elections.
This law ensured that African-Americans received the same protection guaranteed to them under the 15th amendment.
The totalitarian states usually don't allow any opposition parties to exist. If some people try to form a party, they usually end up in prison, are banished from the nation, or even murdered.
The reason why the totalitarian rulers prefer a one party system is in order to have all the power in the country, without having opposition that will constantly go public about the terrors and injustices that are happening. If there are more parties, than the people will start to support them, especially cause rarely who likes to live under a totalitarian ruler, thus the totalitarian ruler will face a situation where he/she will lose its power.