John Kerry actually said...

Overall, however, we assess that we still have a credible chance of reaching a deal that is in the best interest of America's security, as w...

If they lose that conviction, the United States, not Iran, would be isolated, the sanctions regime would collapse.

Our goal is to conclude the major elements of the deal by the end of March and then to complete the technical details by June.

If we thought it was necessary or indeed helpful to have it, to have these additional sanctions during the pendency of the negotiations, we ...