Hopefully the orange buffoon is not stupid enough to start a ground war in Iran but if he does, yah, we'll be short of lots of stuff... or more likely paying more!
As a person, I don't have much use for Trump, but much of what he and his supporters have done had to happen sooner or later.
The writing was on the wall over ten years ago that the measures taken by the US had to happen.
The US "dollar" has been the Fiat currency of the world since WWII, and the proceeds from the trade fees of that currency pay for much of the US world police activities, and much more.
When WWII ended, it was found that there were only two major currencies capable of carrying that weight and responsibility for international trading. One was the US, and surprisingly, Japan. Japan had set up a public "tithing" system where every citizen had to give the government 10% of all their profits, to be banked for public emergencies, and provide retirement/savings. The money was held in the World Bank, and records were kept of every individual's contribution.
As we know, a lot of Japanese didn't make it through WWII, and similar to our own CPP, when all of the recipients passed, the remaining funds were left in the kitty. Many low income Japanese were multi millionaires when they passed.
For many years after WWII, along with a lot of other things, those excess funds rebuilt Japan too an economic and industrial powerhouse. Japan never did allow the "BANKS" to dictate monetary policy.
By the end of the Viet Nam war it soon became apparent to Japan that being the "other" Fiat currency of the world came at a high cost.
It became too easy to bring in money from the proceeds of the "traded" currency fees, and they were letting develpment of industry slide.
There was enough money coming into Japan's coffers to make it easy for them to dump money into "social assistance" programs, and they did.
Finally, by the early nineties, they pulled their currency off the world stage as a trading platform and started redeveloping within their own borders, and building up their armed forces, under the constraints placed upon them by the WWII declarations.
There is much more to it, but there are hundreds of books written on the details.
The US is in a similar place, and if they want to stay at the top of the international food chain, they will have to "fix" a lot of issues.
That fix, just like Japan, will not be well viewed by many.
IMHO, it's too bad we don't have a "Trump" taking care of Canada.