Actually, less than that, since American workers insist on OSHA and EPA protections, etc. Therefore, American wages must be lower, to come up with a market labor cost when you account for these costs.
On the other hand, you have to look at moral hazards of dealing with a foreign government and foreign middle men who might steal your proprietary assets, impose taxes of their own down the road (in retaliation for what Trump does, for example), the management and logistics of bringing finished goods back to the USA, higher inventory costs associated with waiting times, etc. It is not as cut and dried as people might believe.
In general, way more jobs have been lost to technology in the past few decades than have been lost to foreign outsourcing. And while American companies leaving makes news, foreign companies entering our market does not. Fact is, most Toyotas, Hondas, Mercedes and BMWs sold in the USA are made in the USA. Most of these jobs are in red states, however, as foreign companies are smart enough to avoid the labor unions in non-right to work states.
If you want to protect American jobs, get rid of the minimum wage, which would encourage upward mobility and make it more expensive for companies to switch to high tech ways to avoid labor costs. That would have a much bigger impact than tariffs, which would only make the American consumer suffer, and do little to help workers over the long term.
