Lady Gaga, Oprah Winfrey among those expected at Harris campaign concert on Ben Franklin Parkway

"The allegations supporting the revocation are unknown at this time," said President John Fry in a letter, adding that the student has chosen to return home.

Vice President Kamala Harris, presiding over proceedings as the role of the office, read the tally.

The outgoing U.S. senator said he had been “blessed” by the opportunity to perform public service and highlighted what he recounted as key successes throughout his career.