Manufacturing is probably the worst example because trade policy has definitely had an impact there. However, look at other industries: Tier-1 tech support being replaced by chat bots, order-takers being replaced by kiosks and apps, realtors being replaced by self-service apps (ie redfin).

Whether by outsourcing or automation, the cause is the same: Loss of low-skilled jobs in return for cheaper products & services. The challenge is to find the best method to leverage those cheaper products and services to improve quality of life for everyone, especially those who's skills become obsolete.