The Joint Comprehensive Plan of Action, or JCPOA is over as far as the US is concerned. President Trump has given the final word that America will no longer participate in this sham arrangement. Naturally, the complicit media have gone insane, but let's examine a few basic facts:
The so-called “sunset clauses” mean that this deal was eventually to removed anyway. It was not ever designed to be a permanent arrangement, in fact, it was the deal designer's way of not having to deal with the situation themselves.
The deal was a bad one in terms of ensuring Iran was not developing nuclear capabilities. It lacked the teeth to allow anyone at all to go in and actually check that they are doing what they are supposed to be doing.
The deal is not a “deal”. Those who talk about Trump breaking America's word fail to understand that this is a treaty, and as such requires a legal framework to support it. IT has not been ratified, it was done by Obama unilaterally because he feared it was such a bad arrangement that Congress would never pass it. This is why Trump can now shut it down unilaterally. If it had been a better “deal” it would have been enshrined in law.
The reality is that the deal is not actually over, Britain, France, Iran an others are still involved, it just means that America doesn't have to play along with a regime that hates us and pretend that the weapons and research facilities don't exist. Leaving this gives us back out dignity.