What makes you say that? At least, a significant amount of world trade passes through there, and the US is dependent on economies of its trading partners and of the world in general.
If you mean, not many countries ship directly to the US via the Suez Canal, I can imagine that. Europeans sail west across the Atlantic, East Asians sail east across the Pacific. India, perhaps, might go west through the Canal, but I don't know that the US imports much material goods from India (lots of services, of course).
What makes me say that is the fact that none of the top US trading partners are in that region. Almost all of our overseas trade is on Atlantic and Pacific routes, very little through the Suez Canal.
If you mean, not many countries ship directly to the US via the Suez Canal, I can imagine that. Europeans sail west across the Atlantic, East Asians sail east across the Pacific. India, perhaps, might go west through the Canal, but I don't know that the US imports much material goods from India (lots of services, of course).