Inside Walmart’s ambitious plan to make your clothes in America again

On a crisp day in May, Josh Blackman, a third generation cotton farmer, is sitting atop his 14-foot tall John Deere planter on his family farm in Littleton, North Carolina. The planter is an engineering marvel. Its 10 arms create neat rows in the soil, then drop cotton seeds at the right depth, allowing one man to do the work of 50 laborers. By October, this field will be blanketed with fluffy white bolls of cotton that never fail to take the 34-year-old Blackman’s breath away. “Cotton is so...