Donald Trump may think he's a deal-maker, but he's more likely to turn out to be an economy-breaker, putting the U.S. dollar's role as the world's reserve currency at risk. Recession may be the least of our worries — this degree of instant aggression could well bring on a second Great Depression. So while few would disagree that U.S. needs to find a way out of its chronic trade imbalances, a transitional approach to tariffs with cross-party agreement designed to run over at least 2-3 presidential terms — thereby giving time to make the necessary changes — would have made far more sense. Background music: 'When Johnny Comes Marching Home' Cooper Cannell