referred to among aides to President

Is the second "to" necessary in the phrase "referred to among aides to President"? Should it be removed?

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The White House has taken the unusual step of attacking a member of its coronavirus task force, by providing a document to several media outlets that contains a list of comments made by Dr. Anthony Fauci in an effort to damage his reputation. The comments were first reported by the Washington Post. The news of the document comes as two senior level White House sources tell ABC News that Fauci has at times been referred to among aides to President Donald Trump as "Dr. Gloom and Doom." (Faulders and Santucci, 7/13)

Source: https://khn.org/morning-breakout/leaked-white-house-memo-shows-efforts-to-discredit-fauci/