Iran's stance directly clashes with U.S. President Donald Trump 's position that Iran must halt all enrichment amid negotiations marked by uncertainty, despite having reached their most significant step since they began in April with a U.S. offer being delivered to Tehran last week.

President Donald Trump said Monday night his administration’s new Iran nuclear deal would not include any uranium enrichment, contradicting prior

President Trump is calling for Iran to stop enriching uranium as part of a U.S. proposal on the country's nuclear program. Iran is poised to reject the deal's draft, according to Reuters. CBS News' Natalie Brand has more.