Mark A. Fowler is a retired CIA case officer and Iran specialist.
Vice President JD Vance flew out of Pakistan this weekend after more than 20 hours of negotiations from Saturday into Sunday, pulling the plug on the talks with Iranian officials after failing to produce an agreement to end the war with Iran. Within hours, an Iranian official said more talks were still possible. No telling how potential discussions will be affected by the naval blockade of Iran that President Donald Trump announced on Sunday out of frustration over the failed negotiations.