Article continues below advertisementDana White has seen Donald Trump at his most vulnerable.In a recent interview, the UFC boss opened up about the "one time" he saw his politician pal completely "rattled.""I called him on the phone, as a friend, and be like, 'Hey, you good?'" White recalled. "'How you doin?' Unfazed. Like nothing's going on. And, he'll start talking about this and that and that kind of s---."Article continues below advertisementSource: @vigilantfox/InstagramDana White said the only time he saw Donald Trump 'rattled' was when Ivana Trump died.