Fogel was sentenced to 14 years in prison in Russia, which the U.S. has condemned as a wrongful detention, after a small amount of medical cannabis was found in his luggage.

Marc Fogel’s mother lobbied Trump at a campaign event in Butler, Pa., just before an assassination attempt. Now her son is back.

Mr. Fogel, who had lived and taught in many countries, including Russia for nine years, spent 3 ½ years in Russian custody for having cannabis for medical use, and is in poor health.