Fogel was arrested in 2021 while returning to Russia with his wife, Jane, and charged with smuggling marijuana he’d been prescribed in the U.S. for back pain.

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.