Here's an excerpt:
The executive order grants the administration power to place anyone involved, even indirectly, in the construction, manufacturing, textile or mining sector on a global financial blacklist. It also targets 17 of the largest steel and iron manufacturers — one of the few growth spots in the hobbled Iranian economy — along with three foreign companies, including two based in China, under secondary sanctions.
“It sends a signal to other foreign firms that continue to do business with Iranian steel producers that this is off limits,” said Davis, a former Treasury Department official.
Adnan Mazarei, a senior fellow at the Peterson Institute for International Economics, said the sanctions will hurt an Iranian economy that was forced to cut fuel subsidies earlier this year, triggering nationwide protests, but they also will make it harder for government to negotiate with the U.S.
“This will be seen as another sign that the U.S. government cannot be taken at its word when it says it wants to negotiate,” Mazarei said.
Trump ups Iran accusations, says 4 US embassies targeted