Lead: The National Student Clearinghouse has ended its data-sharing relationship with Tufts University researchers who have tracked college-student voting since 2013, the teams announced after mounting pressure. Tufts academics had relied on clearinghouse enrollment and degree‑verification data to map turnout and registration among students. The clearinghouse’s withdrawal interrupts a long‑running, nationally cited dataset and leaves researchers scrambling for alternative sources or revised methodologies. The move raises questions about third‑party data custodianship and the vulnerability of academic research that depends on private intermediaries. Campus researchers and policy analysts warned the decision may chill similar partnerships and complicate evidence-based work on student civic engagement.