A plaintiff sued a defendant in federal district court following a car accident between the parties that occurred in the state where the federal district court is located. The plaintiff asserted a negligence claim under state law, and in good faith alleged damages of $100,000. At the time of the car accident, both parties were domiciled in the forum state. Following the accident, but before filing the complaint, the plaintiff accepted a full-time job in another state and moved to that state with the intent of living there permanently. After a bench trial, the judge ruled for the plaintiff and awarded $70,000 in damages. The defendant appealed the decision, asserting for the first time that the trial court lacked subject-matter jurisdiction. Is the defendant likely to succeed in his appeal?