Whether the district court could dismiss the action for lack of personal jurisdiction when the defendants did not raise that defense in their first Rule 12 motions.
Holding
No. The defendants waived any objection to personal jurisdiction, and the district court could not raise that waived defense on its own initiative.
Reasoning
Federal Rules of Civil Procedure 12(g) and 12(h)(1)(A) require a defendant to include an available personal-jurisdiction objection in its first Rule 12 motion or responsive pleading. A defendant that omits the objection waives it. Here, the defendants moved to dismiss under Rules 12(b)(1), 12(b)(3), and 12(b)(6), yet omitted Rule 12(b)(2), even though nothing in the record suggested that the defense was unavailable when they filed their motions.
Personal jurisdiction differs from subject-matter jurisdiction because it protects an individual liberty interest rather than a limit on the court's constitutional or statutory power. A party may therefore consent to personal jurisdiction by appearing and litigating without timely objection. By failing to raise the defense, the defendants effectively consented to the Puerto Rico court's jurisdiction over them.
Once the defendants waived the defense, the district court could not revive it sua sponte. Allowing the court to do so would unfairly deprive the plaintiff of an opportunity to address the issue and would undermine Rules 12(g) and 12(h), which are designed to prevent piecemeal presentation of threshold defenses. The district court therefore erred in dismissing for lack of personal jurisdiction.