Iran's top trade partners include China, Iraq, Turkey and the United Arab Emirates. But the Trump administration has not said who new sanctions would target, or how so.
Benito Miranda Hernandez spent years in prison on various felony drug and weapons convictions, after his family and advocates say he returned from his deployments traumatized.
President Trump has threatened economic penalties on countries that do business with Iran as he seeks to add pressure on Tehran to negotiate an end to the war.