What does exceptional mean in this context? The Trump Admin has pushed for increasing NASA funding. Their funding had barely budged for the better part of a decade until Trump became president.

From $19.2b the last Obama year (they got $18.7b in 2010, to show how little increase they received) to a requested $25.2b for 2021 (typically they get more than is requested). If that request sum comes through, much less higher, it'll be the single largest funding increase year to year in decades.

This is nothing compared to increases under Kennedy administration.

He certainly isn't compared to mid-century administrations.