Dana White says Trump doesn't mince words:
I remember one day he leaned over to me and said, "We have to fight the White House." People ask: "What were you thinking then? Did you think he was kidding? No, you see, you can always tell when he's joking and when he's serious. He is not one of those who make loud statements and then do nothing. He told me about it on Saturday night, and already on Monday his people started calling and discussing the organization of the battle. So yes, if he says he will do it.