Final answer:
The NAACP took up the case of Nixon v. Herndon with the aim to challenge voting rights discrimination and promote political equality for minority groups.
Step-by-step explanation:
The case of Nixon v. Herndon involved the NAACP taking up legal action to challenge voting rights discrimination. The NAACP had a strategic legal focus on overturning Jim Crow laws through court cases, particularly those affecting the rights guaranteed by the 13th, 14th, and 15th Amendments to the United States Constitution.
One critical aspect of this mission was ensuring the political equality of minority group citizens and the elimination of race prejudice, which included addressing discriminatory practices in voting laws that disproportionately affected African Americans.