The following excerpt is from Morales v. United States, No. 2:18-cv-03051 TLN AC (PS) (E.D. Cal. 2019):
Federal Rule of Civil Procedure 12(b)(1) allows a defendant to raise the defense, by motion, that the court lacks jurisdiction over the subject matter of an entire action or of specific claims alleged in the action. When a party brings a facial attack to subject matter jurisdiction, that party contends that the allegations of jurisdiction contained in the complaint are insufficient on their face to demonstrate the existence of jurisdiction. Safe Air for Everyone v. Meyer, 373
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