Like anything else related to government policy, there are downsides as well. When we tax imports that tax gets passed on to the consumer resulting in higher prices. Plus, it discourages imports, resulting in fewer products available.
Right now, the unemployment rate in the US is 3.7% which is well within the normal, desirable range which in turn means import tariffs are not necessary to protect American jobs.
I think you're being a bit naive.
Many of the people who really know Trump personally say that he never expected to win, and that all he really wanted was the publicity to enhance the value of the Trump brand name. Even when he was in office, he grifted the tax payers for every dollar he could. Things like holding official government functions at his own properties then charging the government top dollar. No other President would have ever done something so blatantly self serving while in office and the fact that he did shows clearly that he never had the good of the country in mind. Only himself.
And that was just one example. Had he been reelected, God only knows what kind of secret deals he'd have made with Putin in exchange for being allowed to build Trump Towers in Russian cities with money from Russian banks.
Outside of assassinations, he was the biggest political disaster this country has ever experienced and even that was probably nothing compared to the disaster a second term might have been.
You cannot put a grifter con artist in office and not expect to get grifted and conned.
