This came up a few months ago when people were saying “But wait, congress has power to set tariff policy”. That was true until the Smoot-Hawley act that is often blamed (probably correctly) for triggering or at least greatly exacerbating the Great Depression. After that, congress ceded tariff control to the executive. AFAIK, there’s nothing stopping congress from taking it back, but I can’t see the current congress doing that.

The article summary in the post explains that it will be transferred to the Trump Presidential Library Foundation just before he leaves office. So it won’t be available for future presidents.