For me, when someone promises to "drain the swamp", they reveal their ignorance and selfishness with their shallow anti-swamp ideology.

Swamps are rich ecosystems with incredible natural beauty and diversity. Draining a swamp is extraordinarily bad in general, even if good for wealthy property developers.

Ironically, it seems that "drain the swamp" turns out to be an apt metaphor for what Trump and that gang have been doing, as promised.