A moonbase?
Abolish food stamps, WIC, welfare, aid to illegal aliens, the departments of Commerce, Education, Housing & Urban Development and Energy, the Bureau of Indian Affairs, the Medicare drug program, much of foreign aid, EITC, and a whole host of positions from the numerous czars down to the Poet Laureate (including everyone with the word "Diversity" as part of their title or job description) and you'll have plenty of money to fund space exploration.
Fire the inept, brown-nosing political administrative bureaucrats at NASA and replace them with real visionaries (Werner von Braun had his faults, but he got things done), give them a budget and a goal, and you'll have an agency that will do us proud.
We'll get a lot more "bang for the buck" by funding space research than we have by pouring trillions down the cesspit of LBJ's "Great Society" programs and their successors . . .