The net effect of the Alaska summit was to give President Vladimir V. Putin of Russia a free pass to continue his war against his neighbor indefinitely without further penalty, pending talks on a broader peace deal.

President Trump struck a remarkably unconcerned tone when asked to address the horrors of war, raising questions about whether he has the leverage to convince Vladimir V. Putin to…

Over recent months, the Kremlin has been trying to move the diplomatic focus away from Ukraine to bilateral issues, such as trade and strategic stability.