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FILE - People walk on the Stanford University campus beneath Hoover Tower, March 14, 2019, in Stanford, Calif. (AP Photo/Ben Margot, File)

FILE - People walk on the Stanford University campus beneath Hoover Tower, March 14, 2019, in Stanford, Calif. (AP Photo/Ben Margot, File)

FILE - People walk onto the University of Southern California campus in Los Angeles, March 12, 2019. (AP Photo/Reed Saxon, File)

FILE - People walk onto the University of Southern California campus in Los Angeles, March 12, 2019. (AP Photo/Reed Saxon, File)