How Iran views the new US sanction

By Heshmat Alavi

The recent Iran sanctions ratified by the U.S. Congress and signed into law by President Donald Trump specifically target the Revolutionary Guards (IRGC) and have caused very interesting reactions from Tehran.
Iranian supreme leader Ali Khamenei has remained silent, signaling his state of shock.  His regime's president, Hassan Rouhani, also indicated the toll of these new measures.
"[F]irst, the Majlis [parliament] will take steps in this regard. If they have the Congress, we have the Majlis," he said in a weak reaction.  This is a president whose executive branch is in charge of the Iran nuclear deal, passing on the official response to the legislative branch.
Aside from legal and technical aspects of these sanctions, Tehran is currently facing regime change policy and support for the Iranian opposition, represented in the National Council of Resistance of Iran (NCRI).