IF Trump can somehow use the "External Revenue Service" to substantially replace the income tax on those earning ORDINARY income (not stock gambling) below $150k/year...well, that would likely give the US the wealthiest middle-class in the world. In doing that, I would expect it to rebuild our wasted cities, our common pride, our infrastructure, etc. Just about everything which has been lost over the last 50years of 'Democrat"+"Republican" grift and sucking up to corporations would seem likely to reverse direction.
The key word here is "Autarky", and it is the strategy Russia (and to a considerable extent China) has used to make itself, again, one of the global superpowers in just over 10 years (starting from when the US-filth-agents overthrew an elected government in Ukraine, pretty-much forcing Russia to take back ITS Crimea, and leading us to where we are today). Autarky is good for the nation which can successfully pull it off. But it requires great leadership, no tolerance for corruption, and -- of course -- the resources and CULTURE willng to walk that manly road. It is not a good strategy for a culture which coddles hedonists and the mentally weak: the mentally and spiritually ill.
It also suggests you stop wasting money and lives on foreign military adventurism; those resources are better spent doing constructive things with payback...such as enforcing borders.