As President Donald Trump hardens his position toward Moscow and seeks new ways to bring the conflict to an end, he is leaving open the prospect of allowing shipments of longer-range missiles to the country that would allow it to strike deeper into Russia,

President Donald Trump’s new weapons deal and his increasing criticism of Vladimir Putin have sparked fear among some Russians that Putin could overplay his hand.

Pentagon officials said details were still being worked out, and experts doubted Mr. Trump’s threat of huge tariffs for Russian trading partners.