Representatives of both Mr. Sanders and Mrs. Clinton moved quickly to try to quell the furor on Tuesday.
Still, even some longtime allies were shocked that she voiced such criticisms of Mr. Sanders in an election year, so close to the start of primary voting.
Mr. Sanders’s denial in his dispute with Ms. Warren over whether he had told her a woman could not defeat Mr. Trump infuriated Mrs. Clinton, according to people close to her.
Mr. Sanders’s subsequent refusal to chastise his supporters for attacking Ms. Warren and her team online only added to her concern.
It’s his online Bernie Bros,” Mrs. Clinton told The Reporter.
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