IMO, this is a form of a threat to Iran tone down its rhetoric with the US presence in the Middle East region. It appears that the US is taking a more aggressive role in the region after the defeat of IS or Isis.
https://www.msn.com/en-us/news/world/in-message-to-iran-white-house-announces-new-military-assets-in-middle-east/ar-AAAX5Wm?ocid=spartanntp&fullscreen=true#image=1 https://www.msn.com/en-us/news/world/in-message-to-iran-white-house-announces-new-military-assets-in-middle-east/ar-AAAX5Wm?ocid=spartanntp&fullscreen=true#image=1
