Ducey was likely talking about this.
https://www.azcentral.com/story/news/politics/arizona/2018/08/27/latina-woman-wouldve-been-mccains-pick-successor-rick-davis-said/1113735002/
Q
That story reads like Davis really didn’t have a clue as to what McCain was thinking...If he was as close as it seems, he should have known.