President Donald Trump signed an executive order in March seeking to close the department, but only Congress has the power to do that. The Education Department plans to announce Tuesday that it will move multiple parts of the agency to other federal departments, an unprecedented and unilateral effort to dismantle an agency created by Congress to ensure all Americans have equal access to educational opportunity and better coordinate federal programs. The move was described by three people informed of the plan ahead of the announcement. Two of these people said six offices within the department would be shifted elsewhere; the...