Amicus Briefs filed before Supreme Court in support of the Unions
- School Districts
- United States Dept. of Justice
- Twenty-two State Governments
- Constitutional Law Scholars
- Labor Law Scholars
- Los Angeles Dept. of Health and Human Services and New York City Health + Hospitals
- National Women’s Law Center and others
- Governor of Montana Steve Bullock
- National Council on Teacher Retirement and National Conference on Public Employee Retirement Systems
- New York City
- International Association of Fire Fighters
- Social Scientists
- Current and Former Republican Members of State Legislatures and Congress
- Twenty-one Past Presidents of the D.C. Bar
- Employment Law Professors
- Public School Teachers
- Cities, Counties, and Local Elected Officials
- New York City Municipal Labor Committee
- American Federation of Teachers and American Association of University Professors
- AFL-CIO
- Peace Officers Research Association of California and others
- California School Employees Association
- National Fraternal Order of Police
- Corporate Law Professors
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