Final answer:
The Voting Rights Act of 1965 is the legislation that most helped Native Americans in New Mexico gain political equality.
Step-by-step explanation:
The legislation that most helped Native Americans in New Mexico gain political equality was the Voting Rights Act of 1965. This act banned discriminatory voting practices and aimed to protect the voting rights of all American citizens, including Native Americans. It was particularly significant for Native Americans as it addressed and eliminated many of the barriers they faced in accessing the political process.
Learn more about Voting Rights Act of 1965