“ ‘He is a unicorn, riding a unicorn over a rainbow.’ ” — Sean Spicer

That's how Sean Spicer lovingly describes his former boss in his new book, "The Briefing,” according to a copy obtained by the Guardian.

“I don’t think we will ever again see a candidate like Donald Trump,” he writes of the "mercurial” president. “His high-wire act is one that few could ever follow. His verbal bluntness involves risks that few candidates would dare take. His ability to pivot from a seemingly career-ending moment to a furious assault on his opponents is a talent few politicians can muster.”