In these types of stand-offs, the Americans usually win, as they are at any point prepared to inflict massive damage upon their own population solely to hurt their adversary. Sure, the tariffs are going to hurt China's export-oriented economy, but it's also going to cause massive price inflation among Americans, which is going to push even more of them into desperate poverty. However the people in Washington who make these decisions don't have to care about an extra 10 million people being made homeless over 5 years, or 50 million going bankrupt because of the added pressure on their finances (mind the recent articles from various banks about American credit card defaults being at the highest level since 2009-2010).