If tariffs are such a failure;
Why is China now rich and powerful?
The per capita income is only $6,600 (2009 est.), so I wouldn't call them rich. They have such a large economy because they have 1.3 billion people.
Unlike the US they are pro-business and reaping the rewards. Much lower corporate tax rate (25% vs 40%), few of the regulations, unions, and other red tape we have here. The way to compete with China is to unleash our own businesses, not to get into a trade war.