Reviewed by David Rooney
Politics and power, in any age, are a dirty business. If the first Broadway transfer from the Donmar Warehouse, <cite>Frost/Nixon</cite>, was a keen reminder of that point, the London company's second transatlantic traveler, <cite>Mary Stuart</cite>, imparts the lesson even more trenchantly. The setting is late 16th-century England, and the writing dates back to 1800, but the spin, chicanery and ruthless self-preserv…