As Washington and Tehran test fragile diplomatic channels, regional powers are competing for the right to shape the future of Middle East negotiations After threatening to destroy Iran’s “whole civilization” a few hours before the deadline he set for Iran, US President Donald Trump suddenly announced a two-week ceasefire that continues to this day, though it remains fragile. Throughout this time, the White House has been urgently pushing the narrative about an active negotiation process with Iran, which is supposedly yielding results. Washington still talks about progress and work on a framework agreement, though Tehran has accused Washington of violations and the US military remains ready to resume combat operations at any moment.  Tehran’s skepticism is understandable: On two previous occasions, negotiations with the Trump administration only brought about an escalation of the conflict.…