Leser v. Garnett arose in the context of women's suffrage in the United States, fueled by the ratification of the Nineteenth Amendment in 1920. This amendment guaranteed women the right to vote, a pivotal victory for the women's suffrage movement that had persisted for decades. The case stemmed from contention in Maryland, where a group of men challenged the legitimacy of the amendment, arguing that it had not been properly ratified by the required number of states. This challenge not only questioned the constitutional standing of the amendment but also raised broader concerns about gender equality in the electoral process.

The Supreme Court, in a unanimous decision, rebuffed the challenge, affirming the legal status of the Nineteenth Amendment. The Court’s ruling underscored the amendment's significance and its role in reinforcing women's enfranchisement within the United States. The justices recognized that the ratification process had been correctly followed, thus bolstering the foundation for women's voting rights further. The decision also sent a message across the nation that the right to vote was now firmly established and protected by the highest court in the land.

The ruling's significance extended beyond its immediate legal implications; it marked a defining moment for women in the United States, solidifying their status as voters and participants in democracy. It signaled a new era in American politics, one in which women could voice their opinions through the ballot. The affirmation of the Nineteenth Amendment by the Supreme Court not only validated years of activism and advocacy but also encouraged further social movements aimed at achieving equality and combating discrimination in various spheres of life.