WASHINGTON—The United States and European allies are exploring banning imports of Russian oil, U.S. Secretary of State Antony Blinken said on Sunday, and the White House coordinated with key Congressional committees moving forward with their own ban. U.S. House of Representatives Speaker Nancy Pelosi (D-Calif.) also said in a Sunday letter that the chamber is “exploring” legislation to ban the import of Russian oil and that Congress intends to enact this week $10 billion in aid for Ukraine in response to Moscow’s military invasion of its neighbor. Blinken stressed the importance of maintaining steady oil supplies globally. “We are now in very active discussions with our European partners about banning the import of Russian oil to our countries, while of course, at the same time, maintaining a steady global supply of oil,” Blinken said in an interview on NBC’s “Meet the Press” show. Blinken, who is on a trip across …