Hopefully it works.
MAD for decades has kept enemy nuclear powers from annihilating each other. Now that Fatboy Jong is in the picture as well as the Ayatollahs from Iran, it's a different set of defensive priorities with these unpredictable enemies. Although it's likely that MAD is effective with them as well.
But just in case Fatboy has a bad hair day, and decides to launch, it's good to see under the Trump administration that our military is now getting the presidential support that it needs.