Assassination of Iranian Nuclear Scientist Could Hamper Biden’s Ability to Negotiate with Tehran Assassination of Iranian Nuclear Scientist Could Hamper Biden’s Ability to Negotiate with Tehran Comments Off on Assassination of Iranian Nuclear Scientist Could Hamper Biden’s Ability to Negotiate with Tehran The murder of Iranian nuclear expert looms large over President-elect Joe Biden’s ability to restore America’s ties with Tehran and save the nuclear deal he helped negotiate when he was vice president. Iran’s parliament passed a bill in the wake of Fakhrizadeh’s murder that allows uranium enrichment, raising concern from nations that signed that deal that the Middle East was about to become far less stable.