Argentine President Cristina Kirchner's firing of the country's central bank president last Wednesday has provoked a constitutional crisis, not unlike the one that rocked Honduras last summer. As with then-Honduran President Manuel Zelaya, Mrs. Kirchner has tried to run roughshod over her nation's laws. She blithely ignored legal protections of bank independence.

Not surprisingly, central banker Martín Redrado refused to go and challenged her reason for sacking him: his refusal to hand over to her...