The DoD Missile Defense Agency is located at Redstone Arsenal. At present, there are 44 anti-ballistic missiles (ABMs) located in Alaska and one at Vandenberg AFB in California. There were supposed to be more, but Obama ended the deployment of already built ABMs.
At present, the US had nothing stationed at Guam. There is a test site in the South Pacific that might be able to do so. We fire an ICBM at it every year or so, to test the existing ICBMs and ABMs as a by product. The THAADS stationed in South Korea and Japan can only shoot down an ICBM on the rise, not when it reaches MACH 8 or higher terminal velocity. The Aegis missile on US destroyers and frigates are capable of shooting down those at the higher altitudes and speeds.
The US can turn North Korea into a glazed parking lot -- while endangering South Korea, Japan and, perhaps, the US with fallout. Hope the proposed laser triggered H bombs were developed -- no fallout, just a big blast.
Stopping Kim, God only knows. Personal fear, a Chinese assassin or a heart attack from his diet.
Why would we stop Trump. He's turning around all the harm done by Obama over the last 8 years.