MASERU, Lesotho —Crowds of women, bundled up in wooly hats and mittens against the sharp winter chill, wait every morning at the gates of a garment factory in Lesotho's capital, hoping that a few among them will be called in to work a shift. But no-one comes out and the factory gates – which bear the name of the Taiwanese company that runs it in red Chinese lettering – remain firmly shut. It's one of the few factories in what used to be called "the Denim Capital of Africa" that's still operating after U.S. President Donald Trump announced in April...