'Hey MORON...it's an import tariff.
McCratchet doesn't get it that an import tariff is like raising the price on a product. When you go shopping, if the price of something goes up, you are less likely to buy it, buy as much of it, or will go looking for it cheaper somewhere else. Or make it yourself.
China has been winning the market for years by undercutting what others (including us) can make it for. A tariff stops that undercutting from taking place. By doing so, it makes other markets (including ours) MORE competitive.
When we buy less, China loses money. Down goes their GDP. They are vitally dependent on our trade.
There, I've made that to where any 6th grader can understand it. Now maybe you might too.