Gotcha, wasn't sure if you were including everyone in the primary or discounting those you don't think have a viable path.
we're down to eight candidates, the only one remaining with no strength anywhere is gabbard. of the other seven, four seem highly improbable, but if accept that there is a good chance that we end up with a contested convention, i'm not sure i any longer feel completely confident in saying any of them (except gabbard and probably steyer) can't secure the nomination.
obviously sanders has a much better chance than anyone else.