Gideon v. Wainwright
Jacob argued that the Constitution allows states to make their own rules about the criminal procedure (how to run criminal trials). He talked about federalism  the separation of powers between federal and state governments that is written into the Constitution. By making a rule saying the states always had to give poor defendants free lawyers, the federal government would be over-stepping its powers. The states would be unable to make their own rules, and this would take away a right the Constitution gave to the states.