1. Does 18 U.S.C. § 2422(b), which criminalizes the attempted
enticement of a minor to engage in "sexual activity for which any
person can be charged with a criminal offense," include an element
requiring the government to charge and prove that the object
sexual activity would violate a particular predicate offense, or is
the specific predicate offense merely a means of satisfying the
§ 2422(b) charge?

2. Regardless of whether the predicate offense is itself an element of
§ 2422(b), does a Court of Appeals constructively amend an
indictment in violation of the Fifth Amendment by sustaining a
§ 2422(b) conviction based on a different predicate offense than the
one that was in fact specified in the indictment and upon which
the defendant was actually convicted at trial?

Does 18 U.S.C. § 2422(b) require proof of a specific predicate offense?