Pence went maskless on the trip and his wife, Karen Pence, told Fox News her husband was unaware of the clinic’s policy until after the visit.
The mask policy was communicated to reporters on the trip by Pence’s office and was revealed in a Thursday tweet by Voice of America reporter Steve Herman.
“All of us who traveled with him were notified by the office of @VP the day before the trip that wearing of masks was required by the @MayoClinic and to prepare accordingly,” Herman wrote.
Herman, who was on the Mayo Clinic trip, told the Washington Post that Pence’s office has threatened to bar him from future trips on Air Force Two for violating the off-the-record terms of the memo.
But a Pence spokesperson later told the paper that repercussions were still up in the air pending an apology from Herman or his employer.
Pence was sharply criticized after the trip for going mask-free.
Photos and videos of the tour showed the vice president bare-faced as he met with the staff of the Minnesota clinic and at least one patient. Everyone else in the footage wore a protective face covering.