Heather Cox Richardson is a historian of American politics with a number of important books on the Civil War, Reconstruction, and the ideological evolution of the Republican Party. Richardson's work tracks the space between rhetoric and reality, showing us how political parties pull the levers of race and class to manipulate public opinion and gain power.

Richardson's recent focus is the way American conservatism has influenced the direction of the Republican Party over the course of the past several decades. In this conversation, she explains how "movement conservatives" since the Buckley era pushed the GOP to embrace increasingly extreme candidates and positions, setting the table for the Trump nightmare:

"Americans figured out fairly early on that [Republican economic policies] didn't really help them. So Republican language has gotten more and more crazy. For me, the real sign was when Carly Fiorina, in the debates in 2016, said that Democrats were literally killing babies so they could sell their body parts . . .

They've had to ratchet this language up more and more. So when Trump came in and said and did the horrific things he did, he was really simply playing that movement conservative narrative out to its logical end. It's exactly the path we started on in 1951 with God and Man at Yale."