Trump is the US president, he views the growth of the markets as part of his term's success.
Probably the meme of the decade:

I believe Trump has his own calculations in the tariff war, the goal might be to create more jobs for Americans
Yeah, firing thousands, threatening allies with tariffs and having tariffs back will of course, create jobs for Americans because??
Rules of a market
- your product is too expensive you need to make it cheaper than the others or people will not buy
- you ban the other products and your product becomes the cheapest but still expensive
- people will anyhow buy less of it as they can't afford it
- the consumer gets f*** , and once that happens, the economy is f****
You know another economy that tried this shit and had all the resources to theoretically do it? It was the USSR. How did their economy fair?