President Trump appears to have been drawn into another Kremlin trap — one that would grant Vladimir Putin not just the territories Russian forces currently occupy, but regions they have failed to conquer and cannot take militarily. These areas, heavily fortified and defended at enormous cost by Ukrainian forces, remain out of Moscow’s reach. For Mr. Putin, the only viable path to securing them now runs through the White House. Mr. Trump is expected to meet the Russian leader in Alaska on Aug.