I read a news article about that Fire and Fury book (not in English, but I'm sure there are plenty of English articles), and it mentioned Trump allegedly liking to retire to his bedroom early and eat a cheeseburger in bed. I guess making up a lie about cheese pizza would have been too obvious. The author must be totally comped, not just an opportunistic hack.
They're subtly preparing their bluepilled followers in advance of the truth getting out. "But Trump does it too!"