CNN: What next after the US and Iran failed to reach agreement in Islamabad

There has been the effort from Washington to keep the pressure on Tehran by invoking this blockade. It could work in Washington's favour, I suspect it won't because I think what the Iranians have shown is that they they would prefer to go down fighting, even if that's not entirely a rational decision as far as the rest of us are concerned, than sign a deal that they view to be surrender - and all of the messaging that we got from these Islamabad talks was that the Trump administration was going there to basically make them surrender, to sign conditions, to sign terms that would be interpreted by them as surrender and capitulation. The Iranians aren't going to do that."