Also, it means higher prices for the consumer.
Also, there is no guarantee that the jobs will come back due to automation.
There is something else we have to watch for regarding unintended consequences. Most of the discussion around trade focus only on the manufacturing segment of the economy. However, it misses two other segments, the merchant and the service segments, which are the fastest growing segments of the economy right now.
Here is an example that I'm sure most here can drive around a few blocks and see.
Next to my office is a strip-mall. In the past year, 2 women's clothing boutiques and a cell phone accessory store opened up in that strip mall. All of these are locally owned businesses, started by average, middle class people (one was started by a woman whose husband lost his job in the oil field - they cashed in their savings to start their shop).
From what I can tell, all these businesses are doing well. In chatting with the woman who started one of the clothing stores, the reason she was able to afford to start her shop is she is able to source merchandise to sell, from China (via Alibaba.com*) very cheap. She would not be able to have the margins to offer what she sells to her base nor would she have had the capital to start if she had to buy only domestic products. At that, if she bought only domestic clothing, she would have to be a high end store with a very limited client market.
If we focus only on manufacturing, we may end up putting an anchor around the necks of all of these people who are taking advantage of the current trade system to become business owners. This is business ownership that is opening up to middle class, not just the wealthy with a lot of capital to invest.
* As an addendum, here is an example. This dress is sourced wholesale from Alibaba.com for about $4, which can be resold for $40.
https://www.alibaba.com/product-detail/Women-s-Vintage-3-4-Sleeve_60486611851.html If someone tried to source this domestically, they would probably pay between $20-$40 wholesale- you can see how that can make start-up and inventory costs skyrocket.