WASHINGTON (AP) — A delegation of U.S. senators was returning Wednesday from a trip to Ukraine, hoping to spur action in Congress for a series of sanctions meant to economically cripple Moscow and pressure President Vladimir Putin to make key concessions in peace talks. It was the first time U.S. senators have visited Odessa , Ukraine’s third-most populous city and an economically-crucial Black Sea port that has been particularly targeted by Russia, since the war began nearly four years ago.