One constant and very strong commonality between Trump and Bernie, is they are both outsiders when you fit all the players in DC under one umbrella.

These two guys are tapping into a existing power by folks who feel disenfranchised and powerless, tired, and angry.

Lots of the established republicans bailed in 2016, not really supporting Trump, and uncertain of all the investigation outcomes.
They did not want to get themselves soiled.....

Now, you have the democrats, and their game.
Remember how they played heavily, relied on the race card, and division, etc....using it against the conservatives, it worked pretty good until Hillary went up against Obama....

You know that outcome. It cost her 8 viable years where I am pretty certain she would have won, if it wasn't for some Black dude out of nowhere....

Look how they used sex scandals/ charges against the conservatives, while covering up their own, for decades....

Now look at Bernie, they have used the unfairness card, victimization, rich vs. poor, haves vs. have-nots, etc....

And it has become such a strong belief, by many, that the established hierarchy/party leaders, can not overcome the entrenchment they themselves created, and promoted....

Moral of the story...... you made your own bed, and will have to sleep in it, don't whine about dirty sheets!