So this is the question I am answering from your OP:
If you voted for Trump, what would make you question or oppose some of the things he does?
Just like every President I have ever voted for there are always decisions, actions, statements that I question. In Donald Trump's case I have never agreed with a 30 foot wall a thousand miles long. I have lived relatively close to the Mexican border for over 3 decades and based on everything I have heard and seen a massive wall would not be a good use of tax revenue. Beyond that, I could do without Trump's tendency to hit back at every attack. But I also recognize that it is in his DNA to hit back being a New Yorker. That is who he is and he is not pretending, so I accept it.
On tariffs and trade I would like to see very specific, limited goals for China, Mexico and EU and have the changes be phased in over a period of years. I view tariffs as an entitlement that other countries have become dependent upon, so if you go for too much too soon you risk full retaliation.