Fear: Trump in the White House – Bob Woodward

Does the final paragraph say it all?

But in the man and his presidency Dowd had seen the tragic flaw. In the political back-and-forth, the evasions, the denials, the tweeting, the obscuring, crying “Fake News,” the indignation, Trump had one overriding problem that Dowd knew but could not bring himself to say to the president: “You’re a fucking liar.”