Right now the market(s) are still betting Trump wins by a long shot.
IMO If Bernie gets the nomination the insurance and drug companies will have a hissy fit and go into all out war mode I think he will have a very hard time.
The markets (housing and stocks) will plummet if it looks like he could actually win, taking down the pension funds of a lot of his supporters. The US Dollar will lose about 50% of its value.
If he wins it will be the start of the little war (you would probably not like the results of).