Republicans in Congress have escalated their fight with Harvard University by issuing subpoenas to university leaders, six weeks after hearings into antisemitism on campus set in motion the resignation of Harvard’s president, Claudine Gay. Virginia Foxx, a Republican from North Carolina who heads the House education and workforce committee that held hearings into the issue last year, ordered Harvard’s trustees to produce documents related to the issue. Foxx accused the Ivy League university of failing to treat the inquiry into antisemitism with “appropriate seriousness” and of failing to satisfy previous requests for information. “I will not tolerate delay and defiance...