The Twenty Fourth Amendment

"Section 1.

The right of citizens of the United States to vote in any primary or other election for President or Vice President, for electors or President or Vice President, or for Senator or Representative in Congress, shall not be denied or abridged by the United States or any State by reason of failure to pay any poll tax or other tax.

Section 2.

The Congress shall have power to enforce this article by appropriate legislation."

This amendment prohibited the federal and state governments from imposing poll taxes before a citizen can participate in an election.  Before this amendment was proposed and ratified it was a way to exclude certain groups of people from voting.   

This cartoon is a depiction of the poll tax and how it stopped millions of people from being able to vote because they couldn't afford it.  

This image shows how many people were upset because the government tried to force people from their right to vote after various amendments of the Constitution had given citizens those rights.