What it would take to rebuild U.S. manufacturing might

America's dependence on imported manufactured goods looks like a vulnerability in a world of widening geopolitical fractures. Fixing it won't come cheap.The big picture: New research from McKinsey, the global consulting firm, estimates that it would take $2 trillion, or about 6% of U.S. GDP, to build the industrial capacity needed to replace imports of key strategic goods.That's the equivalent of two years' worth of the current annual defense budget — and doesn't even include the investment need...