…Other proponents of a constitutional deus ex machina have offered a more modest interpretation of the public debt clause, under which only actual default (as opposed to any action that merely increases the risk of default) is impermissible. This interpretation makes more sense. But advocates of the constitutional solution err in their next step: arguing that, because default would be unconstitutional, President Obama may violate the statutory debt ceiling to prevent it.
The Constitution grants only Congress — not the president — the power “to borrow money on the credit of the United States.” Nothing in the 14th Amendment or in any other constitutional provision suggests that the president may usurp legislative power to prevent a violation of the Constitution. Moreover, it is well established that the president’s power drops to what Justice Robert H. Jackson called its “lowest ebb” when exercised against the express will of Congress.
Worse, the argument that the president may do whatever is necessary to avoid default has no logical stopping point. In theory, Congress could pay debts not only by borrowing more money, but also by exercising its powers to impose taxes, to coin money or to sell federal property. If the president could usurp the congressional power to borrow, what would stop him from taking over all these other powers, as well?
So the arguments for ignoring the debt ceiling are unpersuasive. But even if they were persuasive, they would not resolve the crisis. Once the debt ceiling is breached, a legal cloud would hang over any newly issued bonds, because of the risk that the government might refuse to honor those debts as legitimate. This risk, in turn, would result in a steep increase in interest rates because investors would lose confidence — a fiscal disaster that would cost the nation tens of billions of dollars.