The University of Iowa’s College of Public Health has lost a $15-million gift after the donor, the Wellmark Foundation, withdrew its offer when faculty members rejected a plan to name the college for Wellmark Blue Cross and Blue Shield, The Des Moines Register reported on Monday. University trustees and other officials joined the faculty in criticizing the proposal as a likely conflict of interest, as well as a possible threat to research. John Forsyth, the chief executive of Wellmark, which is Iowa’s largest private insurance company, said the gift would remain withdrawn until the university’s criticism was replaced with “unwavering support.” —Andrew Mytelka