Final answer:
The white primary in Georgia was outlawed by the federal courts in Smith v. Allwright, as it violated the Fifteenth Amendment. This case ensured the right to vote in primary elections regardless of race.
Step-by-step explanation:
The use of the white primary in Georgia was outlawed by the federal courts in the case of Smith v. Allwright. This case was brought by Lonnie Smith of Houston in 1940 after he was refused the right to vote in the Democratic primary because of his race. The Supreme Court ruled in favor of Smith, stating that the restriction violated the Fifteenth Amendment and guaranteeing the right to vote in primary elections regardless of race.