This is dated yesterday. Good analysis IMHO.
http://www.cnn.com/2011/OPINION/07/28/balkin.obama.options/index.html?hpt=hp_t2
We are having a debt-ceiling crisis because Congress has given the president contradictory commands; it has ordered the president to spend money, and it has forbidden him to borrow enough money to obey its orders.
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Ironically, there's no similar limit on the amount of coinage. A little-known statute gives the secretary of the Treasury the authority to issue platinum coins in any denomination. So some commentators have suggested that the Treasury create two $1 trillion coins, deposit them in its account in the Federal Reserve and write checks on the proceeds.
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If the president reasonably believes that the public debt will be put in question for either reason, Section 4 comes into play once again. His predicament is caused by the combination of statutes that authorize and limit what he can do: He must pay appropriated monies, but he may not print new currency and he may not float new debt. If this combination of contradictory commands would cause him to violate Section 4, then he has a constitutional duty to treat at least one of the laws as unconstitutional as applied to the current circumstances.
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Here the president would argue that existing appropriations plus the debt ceiling create an unconstitutional combination of commands. Therefore he chooses to obey the appropriations bill -- which was passed later in time anyway -- and ignores the debt ceiling. He orders the secretary of the Treasury to issue new debt sufficient to pay the government's bills as they come due.
The big test would be whether the markets treat these new bonds just like older bonds. If they do, or if they demand only a slightly higher interest rate, the president will have avoided economic Armageddon and saved the country's economy -- and the world's. The president and Congress can then move on to the real issue: fighting about future appropriations and revenues.