Another good piece today about the underlying nature of this exceptional election season is John O'Sullivan's piece in the Wall Street Journal: The Life of the Party.
He makes one point that hadn't occurred to me, that the traditional Republican and Democratic bases have largely changed places over the past few decades. Wealthy, well-educated white business people who used to be the Republican base are now more likely to be liberal Democrats, while the blue collar working people who used to be the Democratic base are more likely now to be conservative Republicans, or even Tea Party supporters. The party elites in the two parties seem not to have noticed yet, which may be why the "establishment" figures in both parties are in trouble in this election.
He make a number of other interesting and perceptive points, so this is also a piece worth reading.