KRUN, Germany — Four months into Russia’s invasion, unprecedented Western economic retaliation and military aid to Ukraine have not curbed Vladimir V. Putin’s ability or apparent determination to wage war, leaving leaders of the world’s wealthiest democracies grasping for new ways to deter him.
Meeting on Monday in the Bavarian Alps, President Biden and the other Group of 7 leaders were poised to embrace an aggressive but untried plan to manipulate the price of oil and restrict the…
