No, the DC swamp is a self-sustaining, self-proclimated, unelected 4th estate of the government, largely put into place by the Left, full of leftists, which now exists of, by and for itself. And Trump is finding out they are even self-protected, wrapped up in endless laws designed to keep any elected official from even firing or disbanding them no matter how bad the job or what the cause.
There is nothing for democrats to learn. To the Left, the program is everything, their agenda more important than the people, and you will not likely ever see the present democrat party "learn" anything--- the swamp is their seat of power and the people are only as important as needed to get them to keep them in office for the next election cycle.
So long as democrats can still get the rabble to vote for them, the people have served as much purpose as democrats need.