SIMFEROPOL, Crimea — American and Ukrainian officials warned Sunday that Russia may be poised to expand its territorial conquest into eastern Ukraine and beyond, with a senior NATO official saying that Moscow might even order its troops to cross Ukraine to reach Moldova. Ukrainian Foreign Minister Andriy Deshchytsya, appearing on ABC’s “This Week with George Stephanopoulos,” said the prospect of war with Russia is growing. “We don’t know what [Russian President Vladimir] Putin has in his mind and what will be his decision,” Deshchytsya said. “That’s why this situation is becoming even more explosive than it used to be a...