George Mason - Courtesy Wikipedia
June 21, 2012
What it says:
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 for 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.
Why it's important:
Stops government from charging you a fee before you can vote. Poll taxes were a not-so-subtle way of preventing poor people and minorities from voting.