Final answer:
Both the Fifteenth Amendment and the Supreme Court fight racial discrimination in voting rights, not allowing race to restrict voting opportunities.
Step-by-step explanation:
The two excerpts from Passage 1 and Passage 2 show how the concept of voting rights is treated similarly in both the Fifteenth Amendment and the Supreme Court decision in Smith v. Allwright. In Passage 1, the Fifteenth Amendment establishes that the right to vote "shall not be denied or abridged by the United States or by any State on account of race, color, or previous condition of servitude." Similarly, in Passage 2, the Supreme Court's decision in Smith v. Allwright holds that racial discrimination in election processes, like the all-white Democratic Party primaries in Texas, is unconstitutional. Both details demonstrate a commitment to ensuring that voting rights are not restricted based on race.