More than a dozen schools, including Harvard, MIT, Brown, and the University of Pennsylvania, have frozen hiring.

Harvard University is the latest school to implement a hiring freeze as federal funding remains uncertain. President Trump has threatened to cut federal funding for schools that allow "illegal" protests. Universities use millions of dollars in federal funding for student aid and research programs.

Atlanta-based Emory University is among a number of institutions of higher education to announce hiring freezes recently, citing the uncertainty around federal funding.