Their justification for tariffs on Chinese cars was that they were uncompetitively cheap due to subsidies.

This is mostly a lie. EU placed smaller/fairer tariffs based on those subsidy allegations, but in US, all politicians are devoted to oil oligarchy profits. 100% EV tariffs and 50% solar tariffs, 25% battery and ebike tariffs are all about protecting oil, instead of small domestic solar industry. Global warming is a lower priority than war, or making sure existing and new oligarchs have plenty of profits to fund politicians with.