They are rapidly advancing toward having both, and no one is stopping them. I bet our troops in South Korea are not relaxing and enjoying their BBQ....
When half of your missiles blow up on the launch pad you are not racing toward anything. If you want to wring your hands and worry then worry about some Iranian hackers bringing down the NE power grid. That’s about a thousand times more likely and more deadly than Fatboy strapping a Cadillac Escalade sized bomb to a POS missile and getting it to the US.