What if Congress had codified the Monroe Doctrine?

How would the doctrine have differed if it came from a formal report or congressional law rather than a speech?

It would have been more clearly codified and less open to the shifting interpretations that turned Monroe's theory into many different policies.

A formal report or congressional law would have made the policy more clearly codified. The Monroe theory instead remained open to reinterpretation as Americans debated their country's external role. Its later meaning therefore depended partly on changing domestic expectations. Periods described as isolationist could still produce expansive claims about American authority in the Western Hemisphere.