The United States faces defeat in its move to reimpose UN sanctions on Tehran, Iranian President Hassan Rouhani said on Sunday, as Washington declared all UN sanctions on Iran had been restored.
"America is approaching a certain defeat in its sanctions move ... It faced defeat and negative response from the international community," Rouhani said in a televised speech.
"We will never yield to US pressure and Iran will give a crushing response to America's bullying," he said.
The Iranian rial fell to a record low against the US dollar on Sunday following the Trump administration's declaration.
The US currency was offered for as much as 273,000 rials, up from 267,800 rials on Saturday, according to foreign exchange site Bonbast.com, which tracks the unofficial market.
Iran has dismissed the US sanctions move as "void and illegal" and UN Secretary-General Antonio Guterres told the Security Council on Saturday he cannot take any action on the US declaration because "there would appear to be uncertainty" on the issue.