ideological echo chambers and the geographic clustering of the electorate. there are so many of these dynamics obviously, brian, that we can examine the political change through. trump clearly exploited some of that uneasiness, some of that tension that was simmering within the party and within the culture itself. >> another story in this book we've got to share with our viewers is about mark meadows, republican, north carolina, he of the freedom caucus. here it is. when word leaked to gop leadership that meadows had been involved in the plotting against boehner in 2013, even though he ultimately did not oppose him, the brand-new lawmaker requested a meeting with the speaker. quote, he's on the couch, sitting across from me in my chair, and suddenly he slides off the couch, down onto his knees, and puts his hands together in front of his chest, boehner recalls. he says, mr. speaker, will you please forgive me?