Savannah Guthrie’s husband penned a heartbreaking Mother’s Day tribute to his wife as his mother-in-law, Nancy Guthrie, remains missing. “To the strongest person I know,” Michael Feldman wrote via Instagram Sunday, alongside a sweet snap of the “Today” show host kissing their kids, Vale and Charley. “Surrounding you with love on Mother’s Day. ❤️💔❤️,” he added. Savannah Guthrie’s husband shared a heartbreaking Mother’s Day tribute to his wife as the search for his mother-in-law, Nancy, continues. (Seen here: Savannah with her two kids). feldmike/instagram “To the strongest person I know,” Michael Feldman wrote on Instagram Sunday. (Seen here: Nancy and Savannah in 2020.) savannahguthrie/Instagram Nancy, 84, went missing on Feb. 1 when she was believed to be taken from her Arizona home by a masked suspect. The matriarch failed to show up to church services and authorities quickly turned her home into a crime scene.…