The Trump Administration is once again setting up an ultimatum for the US staying in the P5+1 nuclear deal with Iran, this time pushing on EU participants to commit to the idea of changing the deal by May, the next time Trump could withdraw sanctions relief.

President Trump has long opposed the Iran deal, and demands massive changes to the already signed pact, despite everyone else agreeing the terms are final and no renegotiation is needed. US officials suggest the only way to keep them on board is to commit to unspecified future changes.

But in doing so, the Europeans would almost certainly be setting the stage for the deal's outright collapse, as Iran has rejected renegotiation, and the US has set out changes that would almost certainly be non-starters for Iran.