Michael D'Antonio is the author of the book, " Never Enough: Donald Trump and the Pursuit of Success " (St. Martin's Press). Two days after the election, Barack Obama delivered a face-to-face warning to Trump about the risk of keeping retired Gen. Michael Flynn around. In counseling Trump, Obama also acted in the best tradition of commanders in chief who must defend the nation against enemies foreign and domestic. Trump hates to admit a mistake and he wasn't going to do it on the basis of advice from Obama. Editor's note: An earlier version of this article incorrectly said Michael Flynn is an ex-Marine; he is a retired Army officer.

Source: CNN December 04, 2017 23:31 UTC