Earlier quoted context omitted.
America cannot possibly win the space race again, because it has already been won. This is sort of like saying Leif Erikson and the Icelandic Commonwealth won the "the new world race" in 1000AD. Whatever Columbus et al were up to would surely be of trifling concern to future generations.
It also ignores the fact that empires can decline. (Although I think the moon landing is ridiculous there is no scientific reason for it).
And yes, it’s probably also about certain aspects of anxiety and probably some panic about the prospect of American decline after so many decades of squandering everything and letting itself both be bled dry and run off a cliff by a subversive element within.