Money line: “This is what I do for a living.” Didn’t he predict a Bush/Clinton race in 2016 just nine months ago? If he believes what he says here about the parties swinging like “pendulums” from moderate nominees to ideologues and then back again, why would he have named Jeb as a strong contender last November? In fact, the roots of the counterargument are in Matthews’s own shpiel here: Most of the time, they head to the center. This is what Republicans did most successfully in 1952 – when, after twenty years of Roosevelt and Harry Truman – they wanted...