Only with a veto-proof majority in both chambers.
As are felony convictions, top secret docs in a bathroom at your house, sexual assault settlements, and the hundred other career-ending scandals the guy has survived without a scratch so far.
trump doesnt need anything from congress, and probably wouldnt change tariff policy even after said law is passed in a veto-proof way
There is no congress any more, not as an independent body. There is Trump, and there is a body of people who will, in the majority, do anything Trump wants them to do, and is not independent in any way.
Originally it wasn't veto-able (only needed a Concurrent Resolution of 50% in each house, no Presidential signature) but the Supreme Court ruled that part unconstitutional in the early 80s.
Military alliance stuff might be harder. Some stuff like NATO is supported by actual legislation, but other stuff was set up as a kind of gentleman's agreement with the US President-du-jour on the assumption that successors wouldn't be crazy.
[0] https://en.wikipedia.org/wiki/International_Emergency_Econom...