I never said that we should make everyone else adopt our regulations. I said that if they don't have similar regulations and their companies are allowed to destroy the environment we should charge an import tariff on those good based on what the cost of regulation would add. If regulations are basically optional, why would any company choose to add that burden to themselves?
It would basically be like if Boeing decided they would follow FAA regulations when designing planes, but a different manufacturer decided to ignore all regulations. That other manufacturer would be able to undercut Boeing by 50% or more. Speaking of, we do force every country in the world to follow our FAA regulation before they can sell into the US, including regulations on their supply chains.
I don't think democrats consciously support regulation just to harm their own country, but they are massive hypocrites about it, in that they want clean air, clean water, and protected workers but then also want the cheap goods that come from dirty air, dirty water and an abused workforce. I support clean air, clean water and protected workers, and I am willing to pay a little more for it. I also support not hamstringing our industries with regulations then forcing to compete in an open market against un-regulated, often state ran competition.
BTW: There was trade back in the day when tariffs were still in effect. As for a trade war, there has been an on going one for decades and we are loosing because we care more about cheap goods than supporting our own country and values. Other countries mandate labor share to buy our goods, other countries illegally dump goods and cartel, other countries directly and indirectly limit access to their markets, other countries manipulate their currency, other countries effective push people into servitude to make goods, other countries are willing to destroy the local, regional and global environment. But you are right, if we imposed small tariffs on select countries, we would start a trade war and end the world economy.