Bernie's the least morally compromised candidate, and he's getting a blanket press shut-out, with a very few exceptions.  Trump, a supposed "outsider" is getting to use the media almost at will, with Cruz and Hillary close seconds:  Sanders coverage is generally at a negative selective slant when you hear about him at all.

It seems you're not allowed to get this far in the race for president without some significant handles and levers.  Trump might scare the establishment for the simple reason that his supporters don't seem to care about his flaws.  Hillary's got some major flaws that make her vulnerable to the vultures, which her supporters are blithely overlooking:  She's not going to be able to hack it in a split ticket situation, which seems increasingly to be what we're looking at.

If Bernie runs as an independent, he's got a real chance of winning at least the popular vote.