What was the fundamental question addressed in each of these congressional acts?

1. Civil Rights Act of 1964 - The fundamental question addressed in this act was how to end racial discrimination and segregation in the United States and ensure equal rights for all individuals regardless of race, color, religion, sex, or national origin.

2. Voting Rights Act of 1965 - The fundamental question addressed in this act was how to protect the voting rights of minorities and prevent discrimination in voting practices, such as literacy tests and poll taxes, that were used to disenfranchise African Americans and other minority groups.

3. Americans with Disabilities Act of 1990 - The fundamental question addressed in this act was how to ensure equal opportunities and protect the rights of individuals with disabilities in employment, public accommodations, transportation, and other areas of society.

4. Affordable Care Act (Obamacare) of 2010 - The fundamental question addressed in this act was how to improve access to affordable healthcare for all Americans, reduce healthcare costs, and provide protections for individuals with pre-existing conditions.