1. Did the District Court violate the Due Process Clause by barring Defendant-Petitioner from presenting any evidence in his defense at trial, a sanction that was imposed for his failing to produce an individual over whom he had no legal control for a deposition, despite the absence of articulable prejudice to the other side?

2. Does the Due Process Clause require an assessment of a defendant's nationwide business activities before a court may find that it has general personal jurisdiction over the individual on the basis of a few, scattered business contacts with the state?

Did the District Court violate the Due Process Clause by barring Defendant-Petitioner from presenting any evidence in his defense at trial