"Would you have been a better president than Trump?" Colbert asked Christie.
"Yes," Christie said, without hesitation and to audience applause.
Colbert responded with, "I like that, that's nice."
The pair continued the conversation about who Christie's current constituency. Colbert, citing his 15 percent approval rating in New Jersey, asked, "Who likes you?"
Christie was there to promote his new book, "Let Me Finish: Trump, the Kushners, Bannon, New Jersey, and the Power of In-Your-Face Politics."