The states have the power to regulate the practice of law and discipline attorneys
What many Americans do not realize is that the States have the power to regulate the practice of law and discipline attorneys. The following is primarily taken from the American Jurisprudence 2d Law Encyclopedia (the theory and philosophy of American law), Vol. 17 Attorneys at Law, Section 2 Power of state to regulate the practice of law, unless otherwise stated. Citations have been omitted for ease and clarity of reading.
The responsibility of regulating lawyers is an important governmental function in the administration of justice and the responsibility has historically been reserved to the sovereign states. Thus, a state’s authority regarding an attorney’s license to practice law is not preempted by the Federal Constitution, notwithstanding that the licensed attorney may also be a federal judge.