While “This Town” insiders ponder winners and losers and revert to “kicking the can down the road” clichés, deeper currents are operating. Those currents are less about federal budgets and public finance, debt ceilings and sequestration, and much more about the condition of America’s democracy and its social divisions. Political parties reflect shifting social tides and often alter their structures, methods and appeals to seek advantage in those shifting tides. Political power shifts from party to party, but leads to one-party dominance only when times are difficult—the great depression—or when times are relatively calm—the Eisenhower years. Even then, there is often a minority hedge against one-party dominance reflecting Acton’s axiom regarding power corrupting. We will have unstable government, exhibited in quarterly budget battles, until the Republican Party resolves its struggle between traditionalists and tea-party insurgents. So long as traditional Republicans operate in...