Tarrifs always help. It is the nature of a free market. If you don't have good production locally, then things cost more. Someone sees that and realizes the opportunity to START PRODUCING LOCALLY. Then you have local competition. Its not a hard concept.
No. Not "if not". In a country like the U.S. there is ample means of production. The problem is cheap foreign goods flooding the market which disincentivizes local production.
If you have good production locally, there's an incentive to buy local.
If not, customers are paying more *and* making do with less.
Tariffs won't help unless the useless foreign workers and the labour unions get dealt with.
No. Not "if not". In a country like the U.S. there is ample means of production. The problem is cheap foreign goods flooding the market which disincentivizes local production.