Charles P. Pierce has a short but very much on point commentary on the difference between Trump and Sanders, and the inability of the media to make any distinction between the two. This is the key paragraph:
It is not enough to claim that both men are "populists" or that they are both appealing to some amorphous general dissatisfaction with "government." First of all, the only problem Sanders has with government is that it hasn't done enough to fix a rigged financial system and to stop the erosion of a viable middle class. The problem Trump has with government is that he's not running it. One is asking for a revival of grassroots democratic activism. The other is appealing for applause. One campaign's vision is a guy knocking on doors. The second campaign's vision is a strongman on a balcony. One is LaFollette. The other is Peron or, at best, Berlusconi. The first is the way democracy is supposed to work. The second is how democracy always manages to con itself.