Sen. Lindsey Graham called Trump a liar but added that he's a "lot of fun to hang out with."
Graham's remarks appear in an upcoming book about Trump written by two journalists.
Other Trump allies, like White House strategist Steve Bannon, have also characterized Trump as a liar.
In the same exchange, Graham said he's a "lot of fun to hang out with," per the book.
Steve Bannon, Trump's former White House strategist, for example, said he'd often lie to get his way, as Insider's Joshua Zitser reported.