Trump Dispatches New Nuclear Proposal to Iran; Warns 'Swift Progress Necessary to Avoid Serious Consequences' — Day 78

President Trump dispatched a new nuclear proposal to Iran on May 16, 2026 (Day 78), warning that 'swift progress was necessary to avoid serious consequences.' The proposal, transmitted through intermediaries, reportedly requires Iran to commit to halting nuclear enrichment, transfer its stockpiles of highly enriched uranium to a third country, and accept comprehensive international monitoring of its nuclear facilities. In exchange, the United States would ensure Congress formally approves the agreement, lift both primary and secondary sanctions against Iran, and unfreeze billions of dollars in Iranian assets globally. The new proposal represents a structural departure from the informal 'one-page memo' framework that collapsed in the mutual rejection of May 10: by including congressional approval as an explicit mechanism, Trump appears to be addressing Iran's stated concern about long-term US reliability — offering a legislative rather than purely executive guarantee. The enrichment moratorium, HEU transfer, and inspections requirements remain the core sticking points Iran has consistently resisted. The proposal came on the same day the Lebanon-Israel ceasefire was formally extended by 45 days, reducing one active front pressure and potentially creating diplomatic space for the nuclear track. The Al Jazeera Day 78 liveblog headlined the development as 'Trump, Tehran signal talks as Lebanon truce extended,' suggesting both parties were carefully managing diplomatic optics while maintaining military readiness.