Trump’s Greenland gambit followed a familiar playbook—one he wrote himself

For critics baffled by President Donald Trump’s Greenland gambit, there is an overlooked advantage in covering this president. Unlike most political figures, Trump has already published a user’s manual for how he negotiates: the classic Art of the Deal, from 1987, cowritten by journalist Tony Schwartz (who, when Trump ran for office in 2016, called the book “the greatest regret of his life, no question”). The book details Trump’s experiences negotiating his way to the top of New York’s vicious real estate market...