Since the question has to do with the legal process states - in this case Texas - use to push back against national policies they disagree with, you should become familiar with the following concepts:
- Federalism.
- Enumerated (or Delegated) Powers.
- Reserved Powers.
- Implied Powers.
- The Supremacy Clause.
- The 10th Amendment.
- Lawsuits.
- State Attorney General.
- Press Release.