Trump’s rise to power, Ailes understood, was the improbable triumph of many things that Ailes and Fox News represented. After all, Ailes was perhaps the person most responsible for unleashing the angry-man currents of Trump’s victory: he had invented the right-wing media that delighted in the Trump character.
-- Michael Wolff (Prologue paragraph 3)

Importance: This shows the key role that right-wing media had in Trump's rise to prominence and the impact is could have on his Presidency.

Conway now was in a remarkably buoyant mood considering she was about to experience a resounding if not cataclysmic defeat. Donald Trump would lose the election—of this she was sure—but he would quite possibly hold the defeat to under 6 points. That was a substantial victory.
-- Michael Wolff (chapter 1 paragraph 2)

Importance: This is an example of the widespread view among Trump staffers that he could not possibly win the Presidential election.

Bannon’s entire political career, such as it was, had...
-- Michael Wolff (chapter 4 paragraph 3)