Dancing to live music at Zen Garden in Accra. Photo: Francis Kokoroko/The New York Times/Redux On January 20, Christa Núñez, a 51-year-old Cornell Ph.D. student and mother of three, booked five one-way tickets to Ghana. “It just happened to be Inauguration Day,” Núñez told me. It was a humid March afternoon, and we were sitting on the rooftop of her friend and fellow recent expat Davi Mozie’s Airbnb in the Osu neighborhood of Accra. “When Trump won, it became a very important date for me,” she