Your moment of economic horror for the day: the consequences of a bankrupt GM.

I can't believe I just typed "bankrupt GM":

The issue boils down to a historic proposition: Is what's good for GM still good for the country?

"If GM were to go into a free-fall bankruptcy and didn't pay its trade debts, then the entire domestic auto industry shuts down," says Rodriguez. The system — the domestic auto plants and their interconnected group of suppliers — is far bigger than GM. It includes 54 North American manufacturing plants and at least 4,000 so-called Tier 1 suppliers — firms that feed parts and subassemblies directly to those plants. That includes mom-and-pop outfits but also a dozen or so large companies such as Lear, Johnson Controls and GM's former captive Delphi. Beyond those are thousands of the suppliers' suppliers.

Although the Detroit Three directly employed about 240,000 people last year, according to the industry-allied Center for Automotive Research (CAR) in Ann Arbor, Mich., the multiplier effect is large, which is typical in manufacturing. Throw in the partsmakers and other suppliers, and you have an additional 974,000 jobs. Together, says CAR, these 1.2 million workers spend enough to keep 1.7 million more people employed. That gets you to 2.9 million jobs tied to the Detroit Three, and even if you discount the figures because of CAR's allegiance, it's a big number. Shut down Detroit, and the national unemployment rate heads toward 10% in a hurry.

Not to mention putting the State of Michigan into receivership. No, I'm not exaggerating on that one.