Perhaps.
Their delivery systems are still not very reliable.
Not yet. But even with a 1/3 reliability 3 launches = one successful orbital insertion.
Their suspected nuclear devices are still too large to be able to fit on the tip of a missile.
As far as we "know". We don't actually "know" that much about them. Are the low yield explosions indications of failed city buster nuclear bombs or successful tests of enhanced yield (neutron or EMP trigger) bombs?
Their technology is still not sophisticated enough to detonate any EMP device over Kansas.
They have the puzzle pieces.
If they continue to develop their technology, these things will be possible, but not for at least a decade, IMO.
Within a factor of two to how far way from any bomb the CIA said they were when they actually set one off.
Again, you simply leave out the reciprocal consequences of their actions with a hypothetical EMP attack. They are well aware of the hardening our Military has for critical systems and we won't be simply helpless in such an event, and we will be quite capable of annihilating their country if we have the backbone.
If they are getting orders and/or help from China, then what you're really looking at is the jumping off point for the next World War, and likely including the use of Strategic and Tactical Nuclear weapons (whether or not our POTUS likes it, we'll have to retaliate in kind or surrender). If you believe we'll simply capitulate, what is the point of worrying? You're almost all of the way there to being a slave of either the Marxists in our own country, or the ChiComs.
What do you propose we do about it?