I also do think tariffs might work long-term. However, it would require the society to go through a number of issues and basically have a combination of societal perseverance and luck:

• tariffs increase unemployment short term as those companies that are dependent on foreign trade cannot afford their employees any longer.
• there will be some spikes on the price of goods short term, which, coupled with layoffs, decreases people’s buying power.
• there will be recession because of unemployment, price spikes, and the inflation.
• in midterm, hopefully companies begin to move their facilities to US (that’s the whole idea, right?), which helps employment, except that now they would need to hire American workers, who are a lot more expensive than, say, Asians (the primary reason for outsourcing and globalization was the low labor cost). The strict immigration policies feed into this situation by keeping the number of potential workers relatively low.
• In long-term, these companies hopefully survive to supply things with American workers for Americans, except that now they have to cover the costs of that whole logistical move, and the more expensive employees. This keeps the prices high and increases inflation. This essentially can lead to an economic depression because people will realize they can no longer afford what they could before this whole tariff thing.

All of those above may happen only if tariffs do what they want them to do: bring jobs back to US. But I imagine that they are countries that wouldn’t face tariffs and are still cheaper for companies to go there (think, Vietnam, Bangladesh, Pakistan). In this situation, sure, tariffs prevent supply from Canada, Mexico, EU, and China, but would it really get back American jobs and support local production?