"Due process of law is process due according to the law of the land. This process in the states is regulated by the law of the state. Our power over that law is only to determine whether it is in conflict with the supreme law of the land,--that is to say, with the Constitution and laws of the United States made in pursuance thereof,--or with any treaty made under the authority of the United States.""This case shows that the Fourteenth Amendment in forbidding a state to abridge the privileges or immunities of citizens of the United States does not include among them the right of trial by jury in a civil case, in a state court, although the right to such a trial in the Federal courts is specially secured to all persons in the cases mentioned in the Seventh Amendment."
United States Supreme Court, Maxwell v. Dow, 176 US 581 (1900)