Thomas, Smoot Hawley was done for show. At that time the USA was an isolationist country, self-supporting and really didn't do a lot of overseas trade relative to today. We made stuff then and really didn't interact with the world except to get dragged into WWI. Smoot Hawley is overused by the "Free Traders" to argue their economics.

Manufacturing jobs? A lot of people here think manufacturing is in a dirty noisy plant? Some is but very little today. Manufacturing plants today are robots' automation and computer driven. You have to be a smart hard-working person to work in these plants.

Making stuff just gives synergy to an economy and the spin offs from making stuff and producing people in your society with this mind set is parabolic in money and good jobs and growing healthy communities.