At the The Volokh Conspiracy, the Independence Institute‘s Research Director Dave Kopel writes:

On behalf of the Independence Institute, Rob Natelson and I wrote an amicus brief on the Medicaid mandate currently before the Supreme Court. (The ACA requirement that states must drastically expand Medicaid eligibility, or lose all their federal matching funds for Medicaid.)

Read the summary at The Volokh Conspiracy » Independence Institute brief on Medicaid mandate.