The key to understanding the 2012 election is simple: A huge slice of the electorate stayed home. The punditocracy — which is more of the ruling class than an eye on the ruling class — has naturally decided that this is because Republicans are not enough like Democrats: They need to play more identity politics (in particular, adopt the Left’s embrace of illegal immigration) in order to be viable. But the story is not about who voted; it is about who didn’t vote. In truth, millions of Americans have decided that Republicans are not a viable alternative because they are...