On three occasions since mid-2011, the United States has come perilously close to exhausting its borrowing authority under a statutory limit commonly called the debt ceiling. In prior work, the current authors argued that, in the event that the debt ceiling is reached, the President will face a trilemma in which any realistic action he takes — defaulting on government obligations, raising taxes, or issuing debt in excess of the statutory ceiling — would unconstitutionally usurp legislative power. We argued that in such circumstances, violating the debt ceiling would be the least unconstitutional option. Nonetheless, most pundits and politicians, including the President, appear to assume that if the debt ceiling is reached, default wou...