Lethe
Captain
There has been talk about US retirining it's land based missiles and go with air and sea delivery. US sea based deterrence is so robust that they only have ICBM's because of "that's how it has always been".
It would be a sensible move but I am aware of no indication that the idea is being seriously considered. The American establishment seems united in preparing to refresh the entire nuclear deterrence apparatus over the next fifteen years or so. The Trump administration seems unlikely to alter that, except perhaps in the direction of "more".