Council of State Governments
The Council of State Governments (CSG) is a nonpartisan, non-profit organization in the United States that serves all three branches of state government. Founded in 1933 by Colorado state senator Henry W. Toll, CSG is a region-based forum that fosters the exchange of insights and ideas to help state officials shape public policy.
Source: Wikipedia — Council of State Governments (CC BY-SA 4.0)