The sanctions imposed on Russia over its Ukraine invasion have nothing to do with a potential nuclear deal with Iran, US Secretary of State Antony Blinken said on Sunday, after Russia's demand a day before on written guarantees from Washington that its punitive measures won't harm cooperation on Iran.
In an interview with CBS's "Face the Nation" show, Blinken said a potential nuclear deal with Iran was still close, but cautioned that "a couple of very challenging remaining issues" were still unresolved.
