Antony Blinken actually said...

I think the willingness of other countries to continue to work with us on imposing sanctions... is dependent on their continued belief that ...

I think you ask the $64,000 question. The short answer is we do not know.

I think the sanctions that have been imposed to date are what brought Iran to the table.

Ultimately, even if they agree to a short suspension, that is their goal in the long term.