WASHINGTON (AP) — The downfall of Harvard’s president has elevated the threat of unearthing plagiarism, a cardinal sin in academia, as a possible new weapon in conservative attacks on higher education. Claudine Gay’s resignation Tuesday followed weeks of mounting accusations that she lifted language from other scholars in her doctoral dissertation and journal articles. The allegations surfaced amid backlash over her congressional testimony about antisemitism on campus. The plagiarism allegations came not from her academic peers but her political foes, led by conservatives who sought to oust Gay and put her career under intense scrutiny in hopes of finding a...