A gasoline dealer brought a diversity action in State B federal court against a distributor for willfully and knowingly overcharging for the price of fuel over a two-year period. The complaint alleged damages in the amount of $60,000 plus an additional $30,000 for punitive damages as allowed by state law. The dealer is a citizen of State A and the distributor was incorporated and had its principal place of business in State B. A second dealer, a citizen of State B, seeks to join a claim for $40,000 against the distributor in the same action based on the identical issue of overcharging for the price of fuel purchased over a similar time period. The distributor seeks to dismiss both claims due to lack of subject matter jurisdiction. How should the federal court proceed?