The interesting thing about a swamp is that you don't know what's in it until you start to drain it.
Spying on citizens, undermining political rivals using government agencies with impunity and ignoring the rule of law destroy the stability of a nation. They make up the vapors emanating from the Washington swamp that President Trump declared he would drain but they are only the bubbling byproducts of the massive network of corrupt politicians, lobbyists, politically appointed ideological judges and lawless law enforcement officials.
Entrenched power entangled with opposing yet co-dependent desires that run counter to the interests of the American people is the sum total of the motivating forces within the swamp that Trump is facing.