@layman,
Are there any details about what that means though? It could mean almost anything.
The US Air Force is already upgrading to a new generation of stealth bombers that will launch a new generation of nuclear-tipped cruise missiles. Also a new generation of tactical bomb with amazing accuracy (a few of which might also be carried on our strategic bombers in case they spot a mobile ICBM hiding in the wilderness as they overfly enemy territory).
It would be pretty easy to upload all our SLBMs back to eight warheads apiece. Also it might make sense to send most of our subs on patrol again. (Under Mr. Obama our subs mostly stayed in port where they could all be wiped out by a single nuke.)
We could also easily restore the 50 ICBMs that we recently removed from their silos. We probably wouldn't want to put multiple warheads on our ICBMs again because that would limit their range to Russia. With single warheads they can reach China and North Korea.
On the other hand, Mr. Trump could want us to build larger warheads than we currently use. For example, the end of the Cold War came just as the US Navy was transitioning from 100kt warheads to half-megaton warheads. Consequently most of their missiles only have 100kt warheads. In addition to expanding back to eight warheads per SLBM, we could finish manufacturing a full complement of half-megaton warheads for our subs.
Or Mr. Trump could want a much larger expansion of our arsenal that would require the manufacture of entirely new weapons systems.
At the most extreme he could want us to resume underground nuclear testing.