The U.S. is working hard to ship defense aid to Kyiv amid a renewed Russian push in northeastern Ukraine, Pentagon spokesperson Major General Pat Ryder said on May 14. Moscow’s troops launched a new offensive into northeastern Kharkiv Oblast on May 10, just as heavy battles continued to rage further east. “It’s a challenging situation on the battlefield right now in Ukraine,” Ryder said during a press briefing. “But all accounts are that they (Ukraine) continue to take measures to defend their territory,” Ryder said, adding that the U.S. is going to do “everything we can to get them the critic…