Russian forces are “taking advantage” of Western allies’ delays in providing Ukraine with additional military aid, Ukrainian President Volodymyr Zelensky said in his evening address on Feb. 19. “The situation is extremely difficult in several parts of the frontline, where Russian troops have amassed maximum reserves,” Zelensky said, following Monday’s visit to the frontline in northeastern Kupiansk. “They are taking advantage of the delays in aid to Ukraine.” Zelensky’s comments come as Ukraine faces an ongoing Russian offensive on the front lines, having suffered its most significant loss of …