A cringey photo op with a “Trump 2024” hat prompted former Vice President Kamala Harris’ campaign to seriously distance itself from former President Joe Biden, according to the new book, “Original Sin.”

“What is he doing?” Harris reportedly said in response to Biden’s actions at a Pennsylvania event, where he put on a Trump baseball hat over his own following encouragement from the crowd. The excerpt, which has been reported by The New York Post and The Daily Mail, is one of several revelations from journalists Jake Tapper and Alex Thompson, whose reporting documents Biden’s alleged decline and subsequent attempts to cover it up.

“This is completely unhelpful and so unnecessary,” Harris reportedly said regarding Biden’s decision to sport the cap.

A spokesperson for Harris didn’t immediately respond on Tuesday to HuffPost’s request for comment on the report.

The reported incident was one of several recounted in the book, which was released Tuesday, that have made headlines. Previously released excerpts include that Biden’s advisers considered whether he should use a wheelchair during the 2024 campaign and that some Biden administration officials worried whether he was up to handling an emergency in the middle of the night.