This is a domestic Cuban Missile Crisis. A single blunder could have unalterable consequences: If Obama buckles his no-ransom stance, the debt-ceiling-hostage genie will be out of the bottle. If Republicans believe he is bluffing, or accept his position but obstinately refuse it, or try to lift the debt ceiling and simply botch the vote count, a second Great Recession could ensue.
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How to settle this dispute? Here is where (Spanish political scientist )Linz’s analysis rings chillingly true: “There is no democratic principle on the basis of which it can be resolved, and the mechanisms the Constitution might provide are likely to prove too complicated and aridly legalistic to be of much force in the eyes of the electorate.” This is a fight with no rules. The power struggle will be resolved as a pure contest of willpower.

In our Founders’ defense, it’s hard to design any political system strong enough to withstand a party as ideologically radical and epistemically closed as the contemporary GOP. (Its proximate casus belli—forestalling the onset of universal health insurance—is alien to every other major conservative party in the industrialized world.) The tea-party insurgents turn out to be right that the Obama era has seen a fundamental challenge to the constitutional order of American government. They were wrong about who was waging it.