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(CNN) - Former New York Mayor Michael Bloomberg, speaking at Thursday's commencement speech at Harvard University, criticized what he described as a disturbing trend of liberals silencing voices "deemed politically objectionable."
"This spring, it has been disturbing to see a number of college commencement speakers withdraw - or have their invitations rescinded - after protests from students and - to me, shockingly - from senior faculty and administrators who should know better," Bloomberg said.