VIENNA — US Secretary of State John Kerry threatened Thursday to walk away from nuclear talks as he signaled that diplomats won’t conclude an agreement over the coming hours — another delay that this time could complicate American efforts to quickly implement any deal.
“This is not open-ended,” Kerry told reporters outside the 19th-century Viennese palace hosting the negotiations. “We can’t wait forever for the decision to be made. If the tough decisions don’t get made, we are absolutely prepared to call an end to this process.”
It was the strongest indication yet of US frustration with Iran. It comes two days after President Obama promised Senate Democrats the same response to Iranian intransigence, suggesting patience for continuing the current round of discussions was running out as it headed into its 14th day.