An internal audit has largely exonerated the U.S. Department of Education for its handling of sensitive information in the run-up to the release of "gainful employment" rules last year. But the audit report from the department's inspector general included a few mild rebukes, and two Republican senators are calling for a deeper inquiry. The inspector general also said a senior official at the department may have violated a government ethics pledge by having contact with his former employer during the rulemaking process. That official, who was not named in the report, has since left the depa...