I can't think of any positives.

Trump is saying the positives are the it will force companies to build stuff in the US, thus increasing our domestic manufacturing and increasing jobs. I don't see that happening in a significant way, but who knows?

But if that does happen, then the huge amount of revenue that Trump thinks is going to come to the government's coffers won't happen, and that revenue is meant to offset some of the tax breaks for the wealthy, so we're kinda screwed either way.