What was used to prevent african american men from voting in the late 1800s

Poll taxes were used to prevent African American men from voting. Because many of the African American men were poor and could not pay the taxes they could not vote.

Literacy test or (understanding tests) where they were forced to read and explain the text to a white man.

the fourth amendment protects:

"the right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated, and no warrants shall issue, but upon probable cause, supported by oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized."  

so this would mean the denial to search and seizure without warrant or permission.

no because it could make the world a terrible place to live in.