Two Republican senators are calling on Secretary of State Mike Pompeo to release documents related to former Vice President Joseph R. Biden’s son and his work for a Ukrainian energy company, saying Hunter Biden’s role may have been used to influence the Obama State Department. Sen. Ron Johnson, Wisconsin Republican, and Sen. Chuck Grassley, Iowa Republican, sent a letter to Mr. Pompeo Wednesday requesting all State Department records related to Hunter Biden and Burisma Holdings, the company at issue in the corruption probe. They also want to know if the inspector general or another official at the State Department is...