The 22 states that sued over the executive order attempting to restrict birthright citizenship are:

1. Arizona
2. California
3. Colorado
4. Connecticut
5. Delaware
6. Hawaii
7. Illinois
8. Maine
9. Maryland
10. Massachusetts
11. Michigan
12. Minnesota
13. Nevada
14. New Jersey
15. New Mexico
16. New York
17. North Carolina
18. Oregon
19. Rhode Island
20. Vermont
21. Washington
22. Wisconsin

Washington, D.C. also joined the lawsuit. Sources

These States are generally considered to be “blue” states.

North Carolina is the main exception on that list, often being considered a swing state, but leaning Republican in recent presidential elections. Arizona has also become more competitive, though it has leaned Democratic in recent presidential elections after historically being a Republican stronghold.