[defrost]

The US, under Trump, has moved from a state in which

  * regular checks kept HEU processing in Iran under agreed limits, 
  * tunnels were traversed and inertially mapped,
  * leaders were known, and communicated with

to a state in which

  * tunnels have been expanded, unmapped
  * locations of and numbers of HEU caches are no longer known,
  * "leadership" has devolved into a mosaic of cells such that, at best, one or two people know where all HEU caches are, more probably no single person knows where the caches are.

In this later, current state it's far more probable that one or more rogue cells may take their HEU caches and attempt to maximise damage to the US and or Israel.

The DoD under Trump has literally made a poor situation far far worse and greatly increased the likelihood of rogue nuclear weapons.