St Joe keeps hoping to finish what Obama started: Iran agrees to full inspections that verify no WMD, then St Biden can order the USAF to take out all the Ayatollahs and hand Iran over to a decent, Democratic* government instead of their current Autocratic** government.
Iran includes some Kurds, who are Sunni and hate Persians and having their old Ottoman Vilayet broken up into bits that are in Iran, Iraq, Turkey, and Syria, and also some Arabs who were on the wrong side of the
Then (40 years later) the USSR collapsed, Kim II feared regime change was back on the table, and set off an explosion he said was a nuke (seismic data not clear if it was or wasn't).
Later, Kim III set off some explosions that could have been nothing but nukes, so he has 'em, and regime change in the DPRK must remain on hold a while longer.
And Iran is getting close to being able to set off an ambiguous explosion and say 'It's a nuke, baby, it's a nuke!'
The Persians do not seem inclined to stop all production of highly enriched uranium and allow inspectors while the US still has full sanctions, so it's looking like St Joe won't be able to get Iran to disarm completely with UN inspections so the US can easily force regime change, and the JCPOA doesn't seem likely to be resurrected. It ain't like Lazarus.
Added to which, someone (guess who) set off an explosion in an Iranian facility that might be capable of producing bomb-grade enriched uranium, which does not incline Iran to tranquility.
Net: no JCPOA for the foreseeable future!
*Democratic - Defn. A form of government that always does whatever the US tells them to do.
**Autocratic - Defn. Any form of government that does not do whatever the US tells them to do.