Trump has done some very spectacular things. He did stuff that previous US presidents would not do, things that some Americans think ought to have been done. Some of the things he did works, others didn’t.
This is largely due to the world not expecting it and the fickleness of his actions. But the world will soon dismiss Trump and ignore US roles in world affairs if this continues. At home, the initial jubilation at Trump’s make America great again antics is slowly turning into a nightmare for some of his supporters.
Trump was elected president only because his rival was even more unpopular than him. So it depends on whether Trump has managed to make himself even more unpopular than the candidate running against him.
Also, there is suspected Russian’s involvement. Russia would benefit if Trump drags US into a trade war with China. Whoever wins the trade war, it still a win for Russia, i.e. have Trump destroy the credibility of US and limit China’s growing influence.