Nor is it just that the White House telephone number is now answered with a recording that says to call back when government is functioning again. It’s not simply that several countries have issued travel advisories about visiting America. It’s not just that we’re mocked worldwide, with the French newspaper Le Monde writing: “Jefferson, wake up! They’ve gone crazy!”

Rather, it’s that America’s strength and influence derive in part from the success of our political and economic model. When House Republicans shut our government down and leave us teetering on the abyss of default, we are a diminished nation. We have less influence. We have less raw power, as surely as if we had fewer aircraft carriers.

Some Americans think that this crisis reflects typical partisan squabbling. No. Democrats and Republicans have always disagreed, sometimes ferociously, about what economic policy is best, but, in the past, it was not normal for either to sabotage the economy as a negotiating tactic.

In a household, husbands and wives disagree passionately about high-stakes issues like how to raise children. But normal people do not announce that if their spouse does not give in, they will break all the windows in the house.

Hard-line House Republicans seem to think that their ability to inflict pain on 800,000 federal workers by furloughing them without pay gives them bargaining chips. The hard-liners apparently believe that their negotiating position is strengthened when they demonstrate that they can wreck American governance.

The stakes rise as we approach the debt limit and the risk of default — which the Treasury Department notes could have an impact like that of the 2008 financial crisis and “has the potential to be catastrophic.” Astonishingly, Republican hard-liners see that potential catastrophe as a source of bargaining power in a game of extortion: We don’t want anything to happen to this fine American economy as we approach the debt limit, so you’d better meet our demands.