Do district courts have subject matter jurisdiction to impose a criminal sentence in the absence of a showing that the defendant committed an offense against the laws of the United States?

question presented by this Petitionis: . . a oe Do district courts have subject matter jurisdiction to impose acriminal sentence in ; the absence of a showing that the defendant committed an offense against the laws ; : of the United States? oO ; a So " Does 18 U.S.C. § 924(c) violate the Second Amendment to the U.S. Constitution on _ . its face? an : . ; ; oo ~