Republicans' Open Letter to Iran Stirs Controversy
Forty-seven Republican senators started a political firestorm with an open letter to Iran warning that any nuclear deal made with the Obama administration could be undone by a future U.S. president. Both sides of the argument have taken to the airwaves to protest. But the bottom line is how — if at all — will the letter affect negotiations as the U.S. and its partners try to reach a framework agreement with Iran by their end-of-March deadline. VOA's Arash Arabasadi reports.