Legislating in our diverse, contentious country, with our system of separation of powers, has never been, and will never be, easy.

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Within our system of horizontal federalism and separation of powers at the federal (and, separately, the state) level, courts do not have the power to enforce their judgments in the trenches.

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He argued that under a system based on constitutional separation of powers, the person who promulgates a law should not be allowed to interpret it as well.

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Among the 20 leading democracies, Britain's winner-take-all plurality system is shared by only the United States and Canada, whose separation of powers and federal structures make it tolerable, and by New Zealand which suffers from the same see-saw of dogmatic minority government as Britain does.

ECONOMIST: From the archive