“The Republican Party is part of a larger American discussion about the tension between equality of opportunity and protection of property, which is sort of the point of the book, that this is a much larger American discussion, and Republicans began under Lincoln with the attempt to turn the discrepancy between the Declaration of Independence and the Constitution into, at the time, a modern-day political solution. The Republican Party would manage, they hoped, to turn the principle of the Declaration of Independence, that everybody should have equality of opportunity, into a political reality. The Declaration of Independence was, of course, a set of principles; it wasn't any kind of law or codification of those principles. The Constitution went ahead and codified that the central idea of America was the protection of property, so the Republicans began with the idea that they would be the political arm of the Declaration of Independence's equality of opportunity. Throughout their history, three times now, they have swung from that pole through a sort of racist and xenophobic backlash against that principle, tied themselves to big business, and come out protecting the other American principle, which is the protection of property. That tension between equality of opportunity and the protection of property, both of which are central tenets of America, played out in the Republican Party.”

as quoted in "'Not the true Republican Party': How the party of Lincoln ended up with Ted Cruz" http://www.salon.com/2014/09/29/not_the_true_republican_party_how_the_party_of_lincoln_ended_up_with_ted_cruz/ (29 September 2014), by Elias Isquith, Salon