Well this is getting real very quickly.
The US leads with 12 demands it can safely assume Iran will reject.
The last deal took what, 10-ish years to put together? It's quite clear the US is not negotiating.

https://www.aljazeera.com/news/2018/...173257818.html

So if Iran won't deal, and neither will the US...war? unlikely even Trump is that crazy; full sanctions, which the EU will comply with even if they don't explicitly support them.
If Putin didn't arrange this mess then he must be the luckiest world leader alive