To what the word Official refer it?

"But Obama had to wonder. Schumer, Dorgan, Durbin, and now Reid- these four men comprised the upper echelon of the official Democratic leadership in the Senate."

  • 1 relating to an authority or public body and its activities and responsibilities.
  • 2 having the approval or authorization of such a body.
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I'm sorry Rover, I didn't ask for its meaning this time, I meant- official related to what word in the sentences? It's a bit confusing ...
It's an adjective referring to 'Democratic leadership'.
Thanks Rover
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