How would the 15th amendment change southern politics?

The 15th Amendment gave African American men the right to vote which would mean they can vote in general elections and possibly completely change the outcome of an election

Explanation: The 15th amendment was ratified during reconstruction after the civil war and still with racism rolling through the south African Americans could now vote how they wanted, but throughout reconstruction southern states would try numerous times to limit the black vote through poll taxes and other things.