As Vienna negotiations on reviving 2015 deal falter, Biden administration reportedly considers plan in attempt to deter Islamic Republic from hindering progress to agreement

US officials have voiced increasing pessimism regarding the chances for an agreement; Ebrahim Raisi is likely to take an even tougher approach with the West

France urges Iran 'to take the final decisions' to enable restoration of 2015 deal limiting Tehran's nuclear program

As diplomats at talks in Vienna on renewing 2015 pact take a break, Iranian Deputy FM Araghchi says closing gaps to finalize an agreement will be difficult

Vienna talks not expected to yield major breakthrough before June 18 Iranian elections

Ongoing covert actions against Tehran's nuclear program risk causing a rupture with Biden while unlikely to stop a new agreement that both Washington and Tehran want

Chinese envoy says sides agreed to 'pick up their pace' in talks to save 2015 deal, and 'work on sanctions-lifting as well as other relevant issues'

Foreign Minister Zarif indicates he is looking to avoid an impasse over compliance with 2015 pact

Meeting of remaining signatories to 2015 nuclear deal in Vienna look to keep accord alive, despite US withdrawal, sanctions and Iranian violations

As Tehran resumes nuclear development, nations have threatened to bring case before UN Security Council and potentially initiate 'snapback' of sanctions