Did any political campaign in USA ever officially acknowledge practically using Nate Silver's model or numbers?

Did any political campaign in USA ever officially acknowledge practically using Nate Silver's (of 538 blog) models and/or numbers in some way, at least to check their own polls/predictons?

If it was just a campaign member who did it (as opposed to a policy of the whole campaign), it's in-scope as long as the practical effect was meaningful (e.g., it informed the decisions of a fairly-important campaign member).