The Trump Administration is not the first to vow that we would return to the moon decades after having done so the first time. George W. Bush said the same thing in one of his State of the Union addresses. It never happened, and I have no idea how serious he was about trying to make it happen, but the thought that we should do a moon landing sequel has been around for a while now.
Writing today in the Wall Street Journal, Vice President Pence has put a new moon landing back on the nation's agenda, calling it a strategic imperative even if he doesn't really explain just what the strategic importance of another moon landing would be: