Bayard Winthrop is angry. “Washington DC is just completely full of shit,” he tells me, recalling a meeting he had last year in the US capital with a group of senior politicians who wanted to understand how they could bring manufacturing back to America’s heartland.  Winthrop, the CEO and founder of American Giant, an upscale sports clothing company that produces its entire line in the US, is the sort of person who gets pulled into these conversations regularly. His company was launched in 2012 with a single product, a high-quality cotton hoodie, and has since become a poster child for the artisanal manufacturing now beloved of both politicians and millennial consumers.  Winthrop had hoped to have a deep policy discussion — about worker education and skills training, tax credits for investment and infrastructure — of the kind that could help him connect the dots in the parts of rural North Carolina where he does most of his sourcing.  Instead, it was a shallow interaction punctuated by backslapping between senators and advisers who “were all vacationing together in the Hamptons”, he says. “They wanted me to start a vocational training programme for the workers in my area, and I ...