A mission to Mars, a mission to the Moon, space stations, space shuttles and the like are weakly related to national defense. Look at all the Federal government funding of “science” like nutrition, pyschology, whatever strikes Congresses fancy. It’s all the same reasoning. If we want Federal funding of science like this we should amend the Constitution, defining the allowable purposes of the funding, the limits of it, and where it would be better to leave it in the hands of the states.
Is it the position of Paul that we cannot fight “wars” with modern weapons because they are not Constitutionally authorized?