The Ukrainian military might pull its forces back from the key stronghold of Bakhmut, an adviser to Ukraine's president has said in remarks that suggest Russia may capture the city that has become a symbol of Ukrainian resistance. Kremlin forces have waged a bloody, months-long offensive to take Bakhmut, a city of salt and gypsum mines in eastern Ukraine that has become a ghost town. "Our military is obviously going to weigh all of the options. So far they've held the city but, if need be, they will strategically pull back," Alexander Rodnyansky, an economic adviser to Ukrainian President Volodymyr...