Does the power to regulate Commerce with Foreign Nations include the prosecution of a volunteer missionary who engages in noncommercial illicit sexual conduct while a permanent resident of a sovereign foreign country?

QUESTION PRESENTED Does the "power to regulate Commerce with Foreign Nations", in accordance with the United States Constitution art 1, § 8 cl. 3, include the prosécution of a volunteer missionary who engages in noncommercial illicit sexual conduct while a permanent resident of a sovereign foreign country? ii.