Trading countries negotiate trade terms and conditions, all finally agreeing to conditions they deem suitable for themselves. It's called compromise. It was done between Mexico, the US, and Canada.
Normally if there becomes an imbalance, terms are re-negotiated when conditions change. Normally that is. Normally one party doesn't just threaten the other countries it trades with, because even smaller countries have things we need and want, and can also make us hurt. I think everyone understands this, except fucking Trump supporters. They ask "well we are the strongest, we should be dictating the terms" which is the mentality of an abusive husband to a wife that accidentally spills his beer, beat her!
It is becoming very hard to have to listen and deal with these fucking idiots, and we're barely into his term. I half hope that Congress changes the term limits for president, and Obama runs again and beats his sorry old ass.