WASHINGTON — A day after pledging that the 2020 census would not ask respondents about their citizenship, the Justice Department reversed course on Wednesday and said it was hunting for a way to restore the question on orders from President Trump. Officials told a federal judge in Maryland that they thought there would be a way to still add the question, despite printing deadlines, and that they would ask the Supreme Court to send the case to district court with instructions to remedy the situation. President Trump had been frustrated with Commerce Secretary Wilbur Ross for mishandling the White House’s...