If an action is based on New York state law does the New York trial court have both subject and personal jurisdiction over the defendant?

Yes, a New York trial court generally has subject jurisdiction over actions based on New York state law, as these courts are established to handle such matters. Personal jurisdiction over the defendant typically exists if the defendant resides in New York, is served with process in the state, or has sufficient minimum contacts with New York that justify the court's authority. However, specific circumstances may affect personal jurisdiction, so it's important to evaluate each case individually.