WASHINGTON—U.S. and European officials are coordinating with natural gas suppliers around the globe to cushion the impact if Russia were to cut off energy supplies in the conflict over Ukraine, Biden administration officials say. The U.S. and European allies have promised punishing economic and political sanctions if Russia moves its military into Ukraine, but worry about repercussions for Europeans from any such sanctions, including Russia potentially cutting off delivery of its natural gas to Europe at the height of winter. Putin has deployed roughly 100,000 troops near Ukraine’s border for weeks, sparking a diplomatic crisis for Europe and the United States. He denies any intention of invading. Any U.S. and European measures against Russia in the event of an invasion “also have consequences for others, including us,” Secretary of State Antony Blinken said in remarks as part of a lecture series Monday night. “There’s a cost imposed on everyone,” Blinken …