Final answer:
Las v. Nichols, Mendez v. Westminster, and the Magnuson Act all addressed civil rights issues and were important in the history of anti-segregation and civil rights litigation.
Step-by-step explanation:
The cases of Las v. Nichols, Mendez v. Westminster, and the Magnuson Act all addressed the issue of civil rights rather than focusing on specific areas such as immigration policies, U.S. citizenship, labor rights, or voting restrictions. These cases are alike in that they were significant in the history of civil rights litigation, with a particular focus on the rights of people of various ethnic backgrounds in the United States. For example, Mendez v. Westminster was a landmark case that dealt with the segregation of Hispanic children in schools and was pivotal in the fight against educational segregation, which influenced later cases such as Brown v. Board of Education.
Additionally, these pieces of legislation and court decisions reflect the ongoing complexity of federal and state relations concerning immigration. While the Constitution designates immigration and naturalization as powers of the federal government, states such as Arizona and Texas have attempted to pass their laws on the matter, which has led to debates and legal challenges, such as Arizona v. United States. Notably, in that case, the Supreme Court reaffirmed the federal government's supremacy over immigration law and struck down most of Arizona's restrictive immigration policies.