Nobody wants to see that happen. Yet it may happen all the same, and Mr. Obama has to be willing to let it happen if necessary.
Why? Because Republicans are trying, for the third time since he took office, to use economic blackmail to achieve a goal they lack the votes to achieve through the normal legislative process. In particular, they want to extend the Bush tax cuts for the wealthy, even though the nation can’t afford to make those tax cuts permanent and the public believes that taxes on the rich should go up — and they’re threatening to block any deal on anything else unless they get their way. So they are, in effect, threatening to tank the economy unless their demands are met.